Ultra-Sil Compression Sack

Description

The Sea to Summit Ultra-Sil Compression Sack is an ultralight compression bag for pack organisation, reducing bulk by up to two thirds while adding minimal weight. Built from bluesign® approved 30D Ultra-Sil nylon with CORDURA® yarns and a Non-PFC DWR, it’s tough, water resistant and purpose made for squeezing soft gear like clothing or sleeping bags. A flip-top lid keeps the three compression straps tidy, and the side-release/ladderlock hardware makes cinching fast and even. The slippery fabric slides in and out of packs easily, and a drawcord top under the lid contains contents as you compress. Ideal for backpacking, bikepacking and travel, this is a reliable way to create space without repacking your whole kit.

Sea to Summit Ultra-Sil Compression Sack Features

• Compresses soft contents by up to two thirds for efficient pack organisation
• 30D Ultra-Sil nylon with CORDURA® yarns and Non-PFC DWR
• Water resistant fabric; designed for internal pack use
• Flip-top lid with three ultralight compression straps for even, snag-free cinching
• Side-release and ladderlock buckles for quick access
• Low-friction fabric packs and unpacks smoothly

Specifications

Fabric:	30D Ultra-Sil nylon (bluesign® approved) with Non-PFC DWR
Closure:	Drawcord top under flip-lid; three compression straps
Waterproofing:	Water resistant (not seam-taped or roll-top)
5 L (XS):	53 g · 15.2 cm × 15.2 cm × 29.6 cm
8 L (S):	64 g · 18.1 cm × 18.1 cm × 35.5 cm
13 L (M):	82 g · 20.5 cm × 20.5 cm × 43.3 cm
20 L (L):	96 g · 24.0 cm × 24.0 cm × 47.5 cm
35 L (XL):	118 g · 28.8 cm × 28.8 cm × 57.8 cm
Best Use:	Backpacking, bikepacking, travel; internal pack storage