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- Best Use: Pack Organization- Closure: Drawstring Closure With Compression StrapsSpecifications: - Dimensions: 6.0 X 6.0 X 11.7 In- Weight: 1.9 Oz- Volume: 5lTechnology:30d Ultra-Sil:- An Incredibly Lightweight Yet Durable Fabric Used In A Large Number Of Sea To Summit Products. This 30 Denier Nylon Is Made With Cordura® Yarns For Strength, Woven Into A Ripstop Pattern. Two Versions Of The Fabric Are Used: Water-Resistant Products (Such As The Ultra-Sil™ Stuff Sacks) Are Siliconized On Both Sides For Ultimate Packability Waterproof Products (Such As The Ultrasil™ Dry Sack Are) Siliconized On The Outside And Pu-Coated On The Inside To Allow Seam Taping. Both Versions Have A Hydrostatic Head Greater Than 2000mm – Which Makes Them More Than Adequately Waterproof For The Types Of Environments They Are Intended For.