Bags
Best Backpacking Dry Bags: Types, Materials & Buying Guide
A backpacking dry bag is an essential companion for outdoor adventurers, ensuring your gear stays safe and dry no matter the elements. Perfect for hikers, campers, and travel enthusiasts, these versatile bags offer reliable protection from rain, rivers, and spills. This guide explores top choices and practical tips to help you find the ideal dry bag for your next adventure.
Comparison Table: Types and Variations of Backpacking Dry Bags
| Type | Best Use Case | Typical Sizes (L) | Closure System | Carrying Style | Water Resistance | Durability | Notable Features |
|---|---|---|---|---|---|---|---|
| Roll-Top Dry Sack | Organizing gear, clothing, inside pack | 1.5–35+ | Roll-top buckle | Hand-carry/pack in | High | Moderate–High | Ultralight, packable |
| Dry Bag Backpack | Wet/adventurous hikes, portaging | 20–65+ | Roll-top or zipper | Shoulder/backpack | High–Submersible | High | Easily carried, harness, lash pts. |
| Duffel-Style Dry Bag | Expeditions, travel, multi-day trips | 20–110+ | Zipper/roll-top | Shoulder hand/strap | High–Submersible | High | Large capacity |
| Compression Dry Bag | Compacting soft gear (sleeping bags) | 5–20 | Roll-top + straps | N/A | High | Moderate-High | Purge valve/compression straps |
| Clear/Translucent | Quick ID of contents, day adventures | 5–30 | Roll-top | Hand/pack in | High | Moderate | Easy gear visibility |
Types of Backpacking Dry Bags
1. Roll-Top Dry Bags (Sacks)
The roll-top dry bag is the classic style, best suited as internal organizers within your backpack. They’re made from lightweight or ultralight materials (such as 30D–70D nylon or sil-nylon, sometimes Dyneema), offering a protective layer for sleeping bags, clothes, or electronics. They’re compact and come in a range of colors and sizes for easy packing and color-coded organization.
Best for:
- Backpackers aiming for minimal weight
- Pack organization
- Day hikes and overnight trips
- Separating wet and dry items
2. Backpack-Style Dry Bags
Designed with integrated shoulder straps and sometimes a full harness system, these are the go-to for excursions where your bag could get soaked, such as paddling, fording streams, or heavy downpours. They are often constructed with heavier materials (PVC, TPU, high-denier nylon) and can be roll-top or feature waterproof zippers.
Best for:
- Portages, rafting, kayak travel
- Commuting in heavy rain
- Adventure travel
- Anyone who may have to carry their gear overland
3. Duffel-Style Dry Bags
These are large, rugged bags with either roll-top or heavy-duty waterproof zippers. Their wide opening allows for easy access, making them popular for expeditions, canoe trips, or group outings.
Best for:
- Group/backcountry travel
- Basecamp gear transport
- Adventure racers who need bulk storage
4. Compression Dry Bags
Compression dry bags feature additional straps or purge valves, allowing you to remove excess air and compress soft items like sleeping bags or clothes. This maximizes pack space while keeping items dry.
Best for:
- Packing bulky items (sleeping bags, insulated clothing)
- Streamlined, organized packing systems
5. Clear/Translucent Dry Bags
A variant of the classic, translucent dry bags allow you to quickly identify contents without rooting through multiple bags—ideal for day trips and organizing smaller items.
Best for:
- Fast access on the go
- Electronics, food, or first aid
Material Choices: What Your Dry Bag Is Made Of Matters
The material of a dry bag determines weight, durability, water resistance, and even environmental impact.
Popular Materials
Nylon (30D–70D Ripstop, Cordura, or Sil-Nylon)
- Pros: Light, flexible, usually the lightest option, often with PU and/or silicone coatings for water resistance.
- Cons: Not as puncture-resistant as heavier materials, not suited for dragging/abuse.
Dyneema Composite Fabric (DCF)
- Pros: Extremely light and strong, nearly waterproof, UV resistant.
- Cons: Expensive, can be less soft/pliable than sil-nylon.
PVC (Polyvinyl Chloride)
- Pros: Tough, rugged, highly waterproof, affordable.
- Cons: Heavier, less flexible, less eco-friendly.
TPU (Thermoplastic Polyurethane)
- Pros: Strong, flexible, lighter than PVC, eco-friendlier.
- Cons: More expensive than PVC, but less so than DCF.
Construction Details
- Welded Seams: Essential for true waterproofness; better than stitched/sealed seams.
- Coatings: Polyurethane (PU), silicone, TPU increase water resistance.
- Closure Type: Roll-top ensures basic waterproofing; zippers (high-quality, like YKK Aquaseal, HydroLok, TIZIP) allow for submersion.
Usage Occasions: When and Why to Bring a Dry Bag
Backpacking and Overnight Hikes
Use lightweight roll-top sacks for internal packing. A waterproof compression sack is especially valuable for down sleeping bags.
Paddling, Canoeing, or Rafting
A robust, fully submersible dry bag or backpack keeps contents dry if you flip a watercraft or get caught in squalls.
Adventure Travel & Expeditions
Duffel-style dry bags, or large backpack-style options, are essential for transporting gear in unpredictable conditions.
Wet-Weather Hiking
For extended rainy treks, pack liners or multiple dry bags inside your regular pack can safeguard your essentials.
Urban/Commuting
Waterproof dry bag backpacks protect laptops and electronics during bike commutes or heavy city rainstorms.
Organizing Gear at Camp
Color-coded dry bags separate clean clothing, wet clothing, and critical items (like food or first aid).
How to Match a Dry Bag with Your Activities & Outfits
- Hiking/Backpacking: Match lightweight, color-coded dry bags to separate daily clothing, sleeping gear, and electronics. Neutral colors blend in; vibrant colors are easier to spot.
- Paddling/Rafting: Opt for high-visibility or bright colors to locate bags easily if dropped in water.
- Travel/Airport Use: Duffel-style dry bags suit checked baggage. Sleek black or grey dry bag backpacks double as urban commuter or daypacks.
- Fashion/Commuting: Sleek, minimalist dry bag backpacks pair well with any outdoor or athleisure outfit and may complement urban styles, keeping your look sharp and your assets protected.
- Cycling: Choose compact, slim-profile bags that won’t catch on gear or riding attire.
Practical Tips, Advice, & Best Practices
1. Choose the Right Size(s)
- 2–5L: For phones, wallets, meds, first aid.
- 8–13L: For spare layers, food, or small sleeping bags.
- 20–35L: For sleeping bags, several clothing items, or as a full pack liner.
- 50L+: For expeditions, duffels, or basecamp storage.
2. Always Leave Space at the Top
A dry bag’s waterproofing relies on a secure closure; leave some space to allow at least 3 folds before buckling the roll-top.
3. Double Bag Irreplaceable Electronics
Use a smaller dry bag inside a larger one for critical electronics or documents, especially if submersion is possible.
4. Understand Water Protection Ratings
Not all dry bags are submersible—some are “water-resistant” for rain and splashes, while others (with welded seams and waterproof zippers) are fully submersible.
5. Use as an Organization System
Buy dry bags in assorted sizes/colors so you can efficiently separate gear. Know by color/size where your rain gear or camp socks are packed.
6. Maintenance and Storage Advice
- Dry out bags before long-term storage to prevent mildew or degradation.
- Clean with mild soap, avoid high heat or harsh chemicals.
- Check for punctures or leaks before trips, especially older bags.
7. Match Durability to Your Use
If you plan on abusive, off-trail use, or dragging your bag, choose thicker materials (TPU, heavy nylon) or reinforced bottoms.
Technical Comparison Table: Popular Dry Bag Models
| Model | Style | Sizes (L) | Material | Weight (oz) | Closure | Waterproof Rating | Notable Features |
|---|---|---|---|---|---|---|---|
| Osprey Ultralight Dry Sack | Sack | 3, 5, 12, 20, 30, 35 | 40D ripstop nylon | 1–2.2 | Roll-top | Splashproof, not submersible | Rectangular shape, lightweight |
| Sea to Summit Ultra-SIL | Sack | 1–35 | 30D sil-nylon | 0.7–2.3 | Roll-top | Splashproof+, not submersible | Ultralight, semi-translucent |
| Hyperlite Mountain Gear Roll | Sack | 3, 10, 25, 43 | Dyneema (DCF11) | 0.8–2.0 | Roll-top | Fully waterproof | Ultra-durable, ultralight |
| NRS Bill’s Bag | Backpack | 65, 110 | 21–34 oz PVC TobaTex | ~60 | Roll-top/harness | Fully waterproof, highly durable | Heavy-duty, expedition-ready |
| YETI Panga Backpack 28 | Backpack | 28 | Laminated HD nylon | 62.4 | HydroLok zipper | Submersible, airtight | Laptop sleeve, mesh pouch |
| SealLine Discovery View | Sack | 5, 10, 20, 30 | PU/polyester PV-free | 6.8+ | Roll-top, valve | Highly waterproof, not for submersion | Translucent, purge valve |
| Exped Waterproof Liner UL | Pack liner | 30, 50 | 15D ripstop nylon | 1.5+ | Roll-top | Water-resistant, not submersible | Lightest pack liner |
| SealLine Boundary Dry Pack | Backpack | 35, 65, 115 | Vinyl-coated polyester | 62–96 | Roll-top | Fully submersible | Removable harness |
| Sea to Summit Big River | Sack or pack | 5–65 | 420D nylon | 3–10 | Roll-top | Waterproof, high abrasion resistance | Lash loops, versatile |
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Conclusion
A backpacking dry bag may seem like a simple piece of gear, but it’s a critical one that can make or break your outdoor experience. The diversity in design—whether ultralight stuff sacks, robust submersible packs, or expedition-sized duffels—means there’s a perfect dry bag solution for every adventure.
The key is to match the dry bag type and material to your activity, environment, and the items you need to protect. Remember, durability, water resistance, weight, and organizational ability all matter. By investing in quality and following best practices, you’ll protect your gear, streamline your packing, and ensure every journey stays on track—rain or shine.
FAQ
What size dry bag do I need for backpacking?
Choose 8–13L for clothes or food, 20–35L for sleeping bags or as pack liners, and 2–5L for essentials like electronics or first aid. Multiple small bags aid organization.
Are all dry bags fully waterproof?
No. Many are water-resistant for rain and splashes but not submersible. Fully waterproof models have welded seams and special zippers (e.g., YKK Aquaseal, HydroLok) for submersion.
What’s the difference between roll-top and zipper dry bags?
Roll-top bags are reliable for most backpacking needs and are lighter. Zippered bags (with waterproof tech) offer true submersion security but are heavier and more expensive.
Can I use a dry bag as my main backpack?
Yes, if the dry bag is a backpack-style model with shoulder straps and harness. These are excellent for very wet environments or portaging.
How do I ensure my dry bag keeps water out?
Don’t overstuff—leave room to fold the top at least three times (for roll-tops). Close zippers fully on submersible bags. Check for holes and keep seams clean.
How do I clean and maintain a dry bag?
Wash with mild soap and water; air dry completely before storage. Avoid prolonged sun exposure, and do not use high heat when drying.
Is it worth paying extra for Dyneema or DCF dry bags?
For ultralight backpackers or those seeking maximum durability, yes. DCF bags excel in strength-to-weight, but cost more. For casual trips, sil-nylon or PU-coated bags suffice.
Can dry bags float?
Most will float if some air is trapped inside, but weight and contents affect this. Never rely solely on this to protect electronics—double-bag if needed.
Should I use one large bag or several small ones inside my pack?
Using several smaller bags (color-coded) is best for organization, efficient packing, and quick access to specific items.
Can I use a dry bag for non-outdoor or travel purposes?
Absolutely! Dry bags are excellent for commuting with electronics, travel in wet climates, protecting valuables at the beach, and even gym or swim gear.
With this guide, you can confidently select, use, and care for a backpacking dry bag that fits your unique needs—keeping your adventures dry and stress-free.
