Product media01 / 07

Ultra-Sil Compression Sack

Name: Ultra-Sil Compression Sack
Brand: Sea to Summit
Price: 34.95 USD
Availability: InStock
Rating: 4.9 (244 reviews)

4.9 · 244 reviews via Shopify’s catalogSource: Sea to Summit North America · checked Oct 15, 2026

In stock

When you need to compress volume without significantly adding weight, the Ultra-Sil Compression Sack is an excellent solution. Made from a water-resistant, bluesign® approved Ultra-Sil 30D nylon fabric with Non-PFC DWR this compression sack is far tougher than its weight would suggest. Ideal for use inside your pack or travel bag when you need to compress clothing or bulky soft items to allow space for other essentials or fun holiday items. Features Compress soft contents down by as much as two thirds Side-release buckle compression straps for fast and easy access Water-resistant, bluesign® APPROVED Ultra-Sil 30D Nylon fabric with a non-PFC DWR finish Three ultralight compression straps with two ladderlock and one side-release buckles allows easy access and reduces weight Attached flip-top lid prevents straps tangling

ColourHigh Rise

Size5L

$34.95

Checkout at Sea to Summit

Official Sea to Summit store. You're buying direct from the brand.

Sea to Summit is the only Shopify seller we matched for this exact item today.

8 other sellers list similar Sea to Summit items from $22.95.

Secure checkout on Sea to Summit's Shopify store
The seller's own price. Coreplex adds no fees
Returns handled by Sea to Summit

Size: 5L

The Coreplex take

This lightweight compression sack uses durable nylon to shrink soft gear volume by up to two-thirds, making it a reliable choice for efficient travel packing.

Ultra-light 30D nylon
Bluesign approved fabric
Integrated strap management
High user rating
3 colors
5 sizes

Rating

4.9 ★

From 245 reviews

Best for

Optimizing backpack storage space
Hikers and minimalist travelers
Organizing bulky soft items

Worth knowing

Material is water-resistant, not fully waterproof.
Available in five distinct sizes.
Offers three color choices.

Price & stock: Checked today

The summary is AI-written from the listing and these numbers; confirm details with the seller.

Similar items

Other brands' sil compression sack at a similar price

Details

Key features & specs

Compresses soft contents by up to two-thirds for efficient packing
Water-resistant Ultra Sil 30D nylon fabric with non-PFC DWR keeps items dry
Three ultralight compression straps with two ladderlock and one side release buckle for easy access
Attached flip or tip top lid prevents strap tangling
Lightweight design reduces pack weight without sacrificing durability

Material: Ultra Sil 30D nylon with non-PFC DWR finish
Available sizes: 5L, 8L, 13L, 20L, 35L
Dimensions: 29.6 cmAs stated by Sea to Summit North America
Weight: 53 g (5L), 64 g (8L), 82 g (13L), 96 g (20L), 118 g (35L)
Closure: Buckles and drawstring (varies by size)
Pattern: Solid

Summarized from Shopify’s product catalog. Where Sea to Summit North America states a different figure, we show Sea to Summit North America’s.

Specifications

Colour: High Rise
Size: 5L
Size / pack: 5L, 8L, 13L, 20L, 35L

Seller description

Highlights

Dimensions 6.0 × 6.0 × 11.7 in | 15.2 × 15.2 × 29.6 cm Packed Weight 1.9 oz | 53 g Hydrostatic Head 2000 mm

Features

Compress contents down by as much as two thirds
Water-resistant, bluesign APPROVED Ultra-Sil 30D nylon fabric with a C0 non-PFAS DWR finish
Achieve even compression and eliminate bulging with ultralight compression straps - the 5L and 8L include two ladderlock straps and one side-release buckle strap while the 13L and 20L include two ladderlock straps and two side-release buckle straps for maximum compression control on larger loads.
Attached flip-top lid prevents straps tangling

Product details

Materials

Sack: 100% Nylon; Buckles: 100% POM; Webbing: 100% PP Hydrostatic Head 2000 mm 5L 8L 13L 20L 35L Weight 53 g 1.9 oz 64 g 2.3 oz 82 g 2.9 oz 96 g 3.4 oz 118 g 4.2 oz

Dimensions

15.2 × 15.2 × 29.6 cm 6.0 × 6.0 × 11.7 in 18.1 × 18.1 × 35.5 cm 7.1 × 7.1 × 14.0 in 20.5 × 20.5 × 43.3 cm 8.1 × 8.1 × 17.0 in 24 × 24 × 47.5 cm 9.4 × 9.4 × 18.7 in 28.8 × 28.8 × 57.8 cm 11.3 × 11.3 × 22.8 in Imperial Metric

Directions & care

Usage

Internal Storage External Storage Rugged Storage About The Product When you need to compress volume without significantly adding weight, the Ultra-Sil Compression Sack is an excellent solution.

Made from a water-resistant, bluesign approved Ultra-Sil 30D nylon fabric with Non-PFAS DWR this compression sack is far tougher than its weight would suggest.

Ideal for use inside your pack or travel bag when you need to compress clothing or bulky soft items to allow space for other essentials or fun holiday items.

Product Features Compress contents down by as much as two thirds Water-resistant, bluesign APPROVED Ultra-Sil 30D nylon fabric with a C0 non-PFAS DWR finish Achieve even compression and eliminate bulging with ultralight compression straps - the 5L and 8L include two ladderlock straps and one side-release buckle strap while the 13L and 20L include two ladderlock straps and two side-release buckle straps for maximum compression control on larger loads.

Attached flip-top lid prevents straps tangling Learn more

Seller policies

Shipping & Returns

Free US Shipping on Orders $50+ Easy 60-Day Returns For more details, please check out our Help Center .

FAQs

Is this compression sack a good tent storage bag?

Perhaps. Carrying the tent canopy in your pack (with the poles under the compression straps) is a great idea. However - the canopy may not compress that much.