Name: Sea to Summit Ultra-Sil Dry Bag
Brand: Sea to Summit
SKU: A4245-33
Price: 24.95 USD
Availability: OutOfStock

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Ultra-Sil Dry Bag

Ultra-Sil 30D CORDURA · 2000 mm HH · Roll-Top w/ Field Repair Buckle · 6 Sizes · 30–74 g

DescriptionKey FeaturesSpecificationsCare

The Ultra-Sil Dry Bag is the Backpacker Editors' Choice award winner that's been organizing pack interiors since 2006. Built from a bluesign-approved Ultra-Sil 30D nylon with CORDURA yarns, taped seams, and a non-wicking hypalon roll-top closure secured by a patented Field Repair Buckle, it's light and waterproof enough for backpacking, cycle touring, and travel. The semi-translucent fabric shows what's inside, the slippery finish slides into tight pack cells, and the oval base keeps the bag from rolling on sloped ground. Available in six sizes from 3L up to 35L.

Backpacker Editors' Choice (2006)

Award-winning dry bag design that's been the go-to modular organizer for backpacking, travel, and cycle touring since 2006.

Ultra-Sil 30D CORDURA Nylon

Bluesign-approved 30-denier nylon reinforced with CORDURA yarns gives the bag a strength-to-weight ratio much higher than its 30–74 g weight suggests.

2000 mm Hydrostatic Head

Fabric resists 2000 mm of water pressure — more than enough to keep contents dry inside a pack, duffle, or pannier exposed to splashes and brief rain.

Taped Seams

Taped seams keep moisture from wicking through stitch lines, so the bag stays waterproof in the use cases it's designed for.

Roll-Top w/ Field Repair Buckle

Non-wicking hypalon roll-top closure secured by a patented Field Repair Buckle — a buckle you can replace in the field with no tools if it ever cracks.

Semi-Translucent Fabric

Semi-translucent shell shows what's inside so you can find the right bag without opening or labelling every one.

Oval Base

Oval cross-section stops the bag from rolling on sloped surfaces and packs more efficiently against the inside of a backpack or duffle than a round base would.

Slippery Finish

Slippery exterior finish slides easily into tight pack cells and pulls out without snagging on the rest of your gear.

PFC-Free DWR

PFC-free durable water repellent finish helps water bead off the fabric without relying on forever-chemical treatments.

Six Sizes

3L, 5L, 8L, 13L, 20L, and 35L sizes cover everything from a ditty bag of toiletries to a sleeping bag or down parka storage.

Sizes

30 g · 14 × 17.1 × 20.7 cm / 6 × 7 × 8 in · Base 14 × 17.1 cm

32 g · 15 × 17.1 × 30.8 cm / 6 × 7 × 12 in · Base 15 × 17.1 cm

39 g · 17.2 × 19.1 × 36.8 cm / 7 × 8 × 14 in · Base 17.2 × 19.1 cm

13L

47 g · 19.6 × 22 × 43.3 cm / 8 × 9 × 17 in · Base 19.6 × 22 cm

20L

58 g · 23.6 × 26.9 × 47.3 cm / 9 × 11 × 19 in · Base 23.6 × 26.9 cm

35L

74 g · 28.5 × 32.1 × 56.5 cm / 11 × 13 × 22 in · Base 28.5 × 32.1 cm

Variants

Colorways Available

Best Use

Backpacking · Travel · Cycle Touring · Internal Storage

Materials & Construction

Sack Fabric

100% Nylon (Ultra-Sil 30D CORDURA, bluesign APPROVED, PFC-free DWR)

Buckles

100% POM (patented Field Repair Buckle, 15 mm)

Closure

Non-wicking hypalon roll-top

Seams

Taped

Shape

Oval base

Performance

Hydrostatic Head

2000 mm (waterproof — internal storage use)

Not Intended For

Paddle / water sports or external submersive use

What's Included

In Box

1 × Ultra-Sil Dry Bag

Warranty

Sea to Summit Lifetime Guarantee

Hand wash with mild soap and lukewarm water; rinse thoroughly and air dry with the closure open before storing.

Do not machine wash or tumble dry — agitation and heat damage the PFC-free DWR and stress the taped seams.

Re-treat the DWR periodically with a bluesign-approved wash-in or spray-on restorer to keep water beading off the fabric.

Store flat or rolled (not folded) in a cool, dry place away from direct sunlight to protect the CORDURA face yarns and seam tape.

Inspect the roll-top closure and Field Repair Buckle before each trip — the buckle is field-replaceable without tools if it ever cracks.

This bag is rated for internal storage use inside a pack or duffle; it is not designed for paddle sports, submersion, or abrasion-heavy external use. For those conditions, step up to the Lightweight Dry Bag.

Shipping Policy

Components:

All component items (wheels, drivetrains, suspension, brakes, etc.) ship within 2-5 business days of purchase.

Bicycles:

Complete bikes typically ship within 2–3 weeks due to build, tuning, and inspection times. You will receive tracking information as soon as your order is ready to ship.

Riding Gear & Apparel:

Riding gear and apparel orders (helmets, jerseys, gloves, etc.) ship within 2-5 business days.

Returns & Exchanges:

If you received the wrong size or wish to exchange an item, it must be returned in original condition—unused, uninstalled, and with all packaging intact.

For full details, please see our Refund Policy before initiating a return.

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Prepared with intention.

Every product is carefully inspected and handled by our team before it ships. From fit and function to final details, we make sure each piece is ready for the outdoors ahead—so you can focus on the experience, not the gear.

Passion drives us

At SpokeX Bike Co., bikes aren't just our business — they’re our way of life. As a rider-owned and operated shop, every decision we make comes from firsthand experience on the trail, at the race, and on the open road. We know what it’s like to chase a new line, push through the pain cave, and celebrate the ride — because we live it every day.

SpokeX & SX Collective — Mountain Bike Wheelsets, E-MTB Components, Snowboarding, Skiing, Hiking, Running & Camping Gear

Sea to Summit Ultra-Sil Dry Bag

Shipping Policy

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