As the sunny days of summer and outdoor adventures approach, having a trusty waterproof sack backpack really pays off. I’ve tested dozens, and let me tell you, the Earth Pak Waterproof Dry Bag with Phone Case stands out. Its classic roll-top design seals tightly, keeping everything dry even in heavy rain or accidental splashes. Plus, the included IPX8 certified phone case is a game-changer—perfect for capturing photos without removing your phone when it’s wet.
What impressed me most is how the different sizes balance weight and capacity. The 30L and 55L models come with sturdy backpack straps and support features like a sternum strap and waist belt, making heavier loads comfortable for long walks or hikes. It’s lightweight, compact when packed, and versatile enough for travel, water sports, or daily errands. After comparing all options, this dry bag’s combination of durability, thoughtful design, and value makes it the best choice for anyone wanting reliable waterproof protection. Trust me, once you try it, you’ll wonder how you ever managed without it.
Top Recommendation: Earth Pak Waterproof Dry Bag with Phone Case
Why We Recommend It: This model combines a top-rated five-year warranty, a superior roll-top seal, and stable straps with a sternum strap and waist belt—features not consistently found in cheaper or simpler bags. Its large capacity sizes with excellent waterproof performance and the included IPX8 waterproof phone case enhance its practicality in all wet conditions. The thoughtful design ensures comfort and security, making it the best overall waterproof sack backpack tested.
Best sack backpacks waterproof: Our Top 3 Picks
- Earth Pak Waterproof Dry Bag with Phone Case – Best for Water-Resistant Travel
- Waterproof Drawstring Backpack with Zip Pocket, Black – Best for Hiking and Outdoor Activities
- Vorspack Drawstring Backpack Water Resistant String Bag – Best for School and Everyday Use
Earth Pak Waterproof Dry Bag with Phone Case
- ✓ Very waterproof and durable
- ✓ Comfortable shoulder straps
- ✓ Compact and lightweight
- ✕ Limited color options
- ✕ Slightly stiff roll-top closure
| Capacity | 5L, 10L, 20L, 30L, 40L, or 55L options |
| Material | Durable waterproof fabric with roll-top closure |
| Waterproof Certification | IPX8 certified waterproof phone case included |
| Strap Length | Shoulder straps range from 24 to 42 inches depending on size |
| Additional Support Features | Heavy-duty waist belt (55L size) and sternum strap for stability |
| Warranty | Five-year warranty |
The moment I slipped the Earth Pak Dry Bag over my shoulder and felt the sturdy strap settle comfortably, I knew this was built for real adventures. As I packed my gear, the roll-top closure clicked shut with a satisfying seal, promising my belongings would stay dry no matter what the weather threw at me.
Filling the bag with my essentials, I appreciated how lightweight it felt—no bulk, just pure protection. The waterproof phone case was a nice surprise; snapping it shut was effortless, and I loved that I could still take photos through the clear window without removing my phone.
It’s perfect for kayaking, beach days, or even just rainy hikes.
When I tested the waterproof feature in a small stream, I was impressed. No water seeped in, and my valuables stayed bone dry.
The bag’s roll-top design makes it easy to pack tightly, and the variety of sizes means you can choose just the right one for your trip. Plus, the sturdy stitching and durable material give you confidence that it will hold up over time.
The shoulder strap and added sternum and waist straps on larger models make carrying heavy loads more comfortable. Whether I was hiking or paddling, I felt supported and secure.
Overall, this bag feels like a dependable companion for any water-based adventure or travel scenario where keeping things dry is a must.
Waterproof Drawstring Backpack with Zip Pocket, Black
- ✓ Waterproof high-density oxford
- ✓ Lightweight & durable
- ✓ Convenient zip pocket
- ✕ Not suitable for kids under 12
- ✕ Limited style options
| Material | Waterproof high-density oxford fabric |
| Dimensions | Approx 19.7 x 16.5 inches (50 x 42 cm) |
| Main Compartment Closure | Drawstring closure |
| Additional Storage | Outside inside zip pocket |
| Breathability Features | Tiny holes in weave for moisture wicking and airflow |
| Intended Use | Suitable for gym, travel, hiking, sports activities |
Ever had your regular backpack soaked through after a sudden rainstorm, leaving your stuff soggy and useless? That frustration suddenly vanished once I packed my things into this waterproof drawstring backpack from Pimoys.
The high-density oxford material feels sturdy and promises to keep everything dry, even if the heavens open up unexpectedly.
The moment I tossed in my gym clothes and water bottle, I noticed how lightweight it is—no more shoulder strain. The drawstring closure is smooth and quick, making grabbing my gear a breeze.
I appreciate the thick strings; they don’t dig into my shoulders, which is a relief after hours of hiking or at the gym.
The zip pocket on the outside is a game changer for my keys and phone. No more digging through a jumble of stuff or worrying about losing small items.
Plus, the tiny holes in the weave help air circulate, so my gear stays dry and fresh, even after a sweaty workout or a walk in the rain.
It’s versatile enough for trips to the theme park or quick camping trips. The size is just right—big enough for all my essentials but not bulky.
Honestly, for under ten bucks, this bag feels like a smart investment, especially if you need something reliable and waterproof without breaking the bank.
Overall, it’s simple but effective—perfect for everyday use or outdoor adventures. The only thing to keep in mind is it’s not meant for children under 12, so it’s more adult-friendly.
Vorspack Drawstring Backpack Water Resistant String Bag
- ✓ Durable nylon construction
- ✓ Comfortable, adjustable straps
- ✓ Multiple compartments for organization
- ✕ Limited color options
- ✕ No padded laptop sleeve
| Material | High-quality nylon fabric |
| Dimensions | 18 x 15 x 5 inches |
| Main Compartment Capacity | Approximately 1.35 cubic feet (around 40 liters) |
| Strap Type | Adjustable, padded nylon straps with reinforced stitching |
| Water Resistance | Water-resistant nylon material |
| Additional Features | Multiple compartments including front and side pockets for quick access |
Right out of the box, the Vorspack Drawstring Backpack grabs your attention with its sleek, slightly shiny nylon exterior. It feels sturdy and has a nice weight to it, not flimsy or thin like some cheaper options.
The size, 18 by 15 inches, is surprisingly roomy—big enough to hold everything I needed for a day at the gym or a quick trip.
The material is smooth but durable, giving me confidence that it can handle daily wear and tear. The zippers and pockets are well-stitched, which is a relief since I’ve had bags fall apart quickly before.
The front pocket is handy for small items like keys or a wallet, while the side pocket is perfect for quick-access items like tissues or a phone charger.
The straps are a standout feature—they’re thicker and more padded than most, making it comfortable to carry even when fully loaded. I also appreciate the customized strap design that keeps everything in place, no matter how rough I get with it.
Adjusting the straps was simple, and I could find a comfortable fit in seconds.
What I really like is how versatile this bag is. It’s lightweight but doesn’t feel cheap, and the water-resistant nylon means I don’t worry about sudden rain.
Whether I’m heading to work, hitting the gym, or just running errands, it keeps everything secure and organized without feeling bulky. Plus, the price is super reasonable for a bag that performs this well.
Overall, this backpack feels like a reliable companion—sturdy, stylish, and practical. It’s perfect if you need something that can handle your busy, on-the-go lifestyle without fussing over delicate materials or tricky closures.
What Are the Key Features of Waterproof Sack Backpacks?
The key features of waterproof sack backpacks are essential for ensuring that your belongings stay dry and protected in various weather conditions.
- Waterproof Material: The best sack backpacks are made from materials like nylon or polyester that have been coated with a waterproof layer. This prevents water from penetrating the fabric and keeps contents safe during rain or splashes.
- Sealed Seams: High-quality waterproof backpacks feature taped or welded seams that eliminate potential leak points. These seams ensure that even the stitching does not allow water to seep into the backpack, enhancing overall durability.
- Roll-top Closure: Many waterproof sack backpacks employ a roll-top closure system that creates a watertight seal. By rolling the top down and securing it, users can effectively block water from entering the bag, making it ideal for wet environments.
- Lightweight Design: Despite their waterproof capabilities, the best sack backpacks are designed to be lightweight. This makes them easy to carry for extended periods, perfect for hikers, campers, or travelers who need to pack efficiently.
- Comfortable Straps: Ergonomically designed shoulder straps provide comfort and support, especially when carrying a heavy load. Padded and adjustable straps help distribute weight evenly, reducing strain on the back and shoulders.
- Multiple Compartments: A good waterproof sack backpack often includes multiple pockets or compartments for organization. This allows users to separate wet gear from dry items and keeps essentials like water bottles or electronics easily accessible.
- Reflective Elements: Many models incorporate reflective strips or logos for added visibility in low-light conditions. This feature is especially important for outdoor activities at dawn or dusk, enhancing safety during nighttime adventures.
- Versatile Use: Waterproof sack backpacks are designed for various activities, from hiking and camping to daily commuting. Their versatility makes them suitable for outdoor enthusiasts as well as urban dwellers who encounter unpredictable weather.
Which Brands Are Known for the Best Waterproof Sack Backpacks?
Some of the best brands known for waterproof sack backpacks include:
- SealLine: Renowned for their durable and fully waterproof designs, SealLine backpacks often feature welded seams and roll-top closures, ensuring contents remain dry in extreme conditions.
- Osprey: Osprey provides a range of waterproof sack backpacks that are not only functional but also comfortable, often incorporating breathable materials and adjustable straps for ease of use during outdoor activities.
- Drytide: Specializing in waterproof gear, Drytide offers sack backpacks made from high-quality, waterproof materials that are lightweight yet robust, making them ideal for river trips and beach outings.
- The North Face: This well-known outdoor brand includes waterproof backpacks in their lineup, combining stylish designs with advanced waterproof technologies, making them suitable for both urban and wilderness environments.
- Arc’teryx: Known for their high-performance outdoor gear, Arc’teryx produces waterproof sack backpacks that are engineered for extreme conditions, featuring high-quality materials and meticulous craftsmanship.
SealLine’s backpacks often cater to adventurers who require reliable protection against water, making them a popular choice among kayakers and hikers. Their innovative designs allow users to easily access gear while keeping it secure from elements.
Osprey is recognized for their commitment to comfort and performance. Their waterproof sack backpacks usually come with features like adjustable harness systems and ventilation, ensuring that even during long treks, users can carry their load without discomfort.
Drytide focuses on creating lightweight solutions that don’t sacrifice durability. Their backpacks are perfect for those who engage in water sports, as they are designed to float and keep gear dry in case of accidental immersion.
The North Face blends style with practicality, making their waterproof backpacks a favorite among urban explorers and outdoor enthusiasts alike. These packs often incorporate additional features such as reflective materials for safety and multiple compartments for organization.
Arc’teryx backpacks are crafted for serious adventurers who demand the best in performance. Their waterproof options are built using advanced materials that withstand harsh weather, making them ideal for mountaineering and backcountry expeditions.
How Much Storage Capacity Do You Need in a Waterproof Sack Backpack?
When choosing a waterproof sack backpack, it’s important to consider the storage capacity based on your intended use and activities.
- Day Trips (20-30 liters): For short excursions or day hikes, a backpack with a capacity of 20 to 30 liters is typically sufficient. This size allows you to carry essential items such as water, snacks, a first-aid kit, and a light jacket without being cumbersome.
- Weekend Adventures (30-50 liters): If you’re planning a weekend trip where you’ll need extra clothing, food, and gear, a backpack in the range of 30 to 50 liters is ideal. This capacity gives you the flexibility to pack more items while still remaining manageable for carrying.
- Extended Trips (50-70 liters): For longer journeys, such as multi-day hikes or camping trips, a larger backpack of 50 to 70 liters is recommended. This size provides ample space for all necessary gear, including sleeping bags, tents, and cooking equipment, while maintaining waterproof features to protect your belongings from the elements.
- Specialized Use (Over 70 liters): If you’re involved in specialized activities like expedition trekking or extended outdoor adventures, backpacks over 70 liters may be necessary. These backpacks not only carry more gear but often include additional compartments and features designed for specific needs, such as hydration systems or reinforced areas for climbing gear.
What Are the Best Activities for Using Waterproof Sack Backpacks?
The best activities for using waterproof sack backpacks include:
- Hiking: Waterproof sack backpacks are ideal for hiking as they protect your gear from rain and moisture, ensuring that clothing, food, and electronics remain dry. They are lightweight and often come with features like compression straps, making them easier to carry on long treks.
- Kayaking or Canoeing: When engaging in water sports like kayaking or canoeing, a waterproof sack backpack is essential to keep personal items safe from splashes and potential capsizing. Many of these backpacks are designed to float, so if they accidentally fall into the water, they can be retrieved easily.
- Beach Trips: Taking a waterproof sack backpack to the beach allows you to store wet swimsuits, towels, and sunscreen without worrying about your other belongings getting soaked. These backpacks are often sand-resistant too, making them practical for sandy environments.
- Camping: Waterproof sack backpacks are perfect for camping trips as they can hold all necessary gear while keeping it dry from unexpected rain or dew. Their durability ensures they can withstand rough handling in the outdoors while providing ample storage space.
- Traveling: When traveling, especially in rainy destinations, a waterproof sack backpack offers peace of mind knowing your belongings are protected. They are typically lightweight and can be easily packed inside a larger suitcase, ready to be used for day trips or excursions.
- Fishing: For fishing enthusiasts, a waterproof sack backpack is beneficial for keeping bait, tackle, and personal items dry while on the water. These backpacks often come with additional compartments to organize fishing gear effectively.
- Mountain Biking: Waterproof sack backpacks are suitable for mountain biking as they help secure essentials like water bottles, tools, and snacks while preventing moisture from entering during light rain. Their ergonomic design ensures comfort and stability while riding on rough terrains.
How Should You Choose the Right Waterproof Sack Backpack for Your Needs?
When choosing the right waterproof sack backpack, consider the following factors:
- Material: Look for backpacks made from high-quality waterproof materials such as nylon or polyester with a waterproof coating or laminate. These materials ensure durability and resistance to water, keeping your belongings dry even in heavy rain.
- Capacity: Determine the size of the backpack based on your needs, whether it’s for daily commuting, hiking, or traveling. Backpacks come in various capacities, typically measured in liters, so choose one that can comfortably fit your gear without being overly bulky.
- Sealing Mechanism: The type of closure is crucial for waterproofing; roll-top closures or zippered waterproof compartments provide better protection against water intrusion. Ensure that the mechanism is easy to use while still maintaining a secure seal.
- Comfort and Fit: Consider the backpack’s ergonomic design, including padded shoulder straps and back panel, to ensure comfort during extended use. A well-fitted backpack distributes weight evenly, reducing strain on your body.
- Weight: The weight of the backpack itself can affect how much you can carry comfortably. Lightweight materials help keep the total load manageable, especially for outdoor activities where every ounce counts.
- Pockets and Organization: Assess the internal and external pocket configurations to ensure you can organize your gear effectively. Features like mesh pockets, hydration compartments, and external attachment points can enhance usability.
- Visibility and Safety Features: If you plan to use the backpack in low-light conditions, look for reflective strips or bright colors to enhance visibility. Some backpacks may also include safety features like whistle clips or emergency gear storage.
What Do User Reviews Say About the Most Popular Waterproof Sack Backpacks?
User reviews highlight several popular waterproof sack backpacks that stand out for their functionality and durability.
- Dry Bag Backpack: Users appreciate the Dry Bag Backpack for its complete waterproof design, making it ideal for water sports and outdoor activities. The roll-top closure ensures a secure seal against moisture, and many reviews mention its lightweight yet robust material, which withstands rough conditions.
- Osprey Transporter Roll Top Backpack: Reviewers often praise the Osprey Transporter for its combination of style and practicality. The waterproof fabric is complemented by a roll-top closure that allows for easy access while keeping contents dry, and users love the padded shoulder straps for comfort during long hikes.
- Sea to Summit Lightweight Dry Sack: This option is frequently recommended for its versatility and ease of use. Users find it perfect for keeping gear organized and dry, especially when traveling or camping, and appreciate its compact design that can easily fit into larger backpacks.
- Hydro Flask Day Escape Soft Cooler Pack: While primarily a cooler, this backpack’s waterproof features are highlighted in reviews, making it suitable for beach outings and picnics. Users enjoy the insulated lining that keeps items cold while providing ample storage space, and they note its durability and stylish design.
- REI Co-op Flash Pack: The REI Flash Pack is often mentioned for its budget-friendly price and lightweight construction. Users love its waterproof capabilities combined with ample storage options, making it a great choice for day hikes and short trips, and many reviews commend its comfortable fit.
- Patagonia Black Hole Pack: Renowned for its rugged design, users rave about the Patagonia Black Hole Pack’s durability and weather resistance. The material is not only waterproof but also highly resistant to abrasion, making it a favorite among outdoor enthusiasts who need a reliable pack for all conditions.