The Ultra-Sil Dry Bag Won The Sought-After Backpacker Editors´ Choice Award In 2006 And Remains The Ideal Dry Bag For Backpacking And Travel. Made With Lightweight, Waterproof Bluesign® Approved 30d Ultra-Sil Fabric Featuring Cordura® Yarns, It´s The Perfect Choice To Organize Your Gear Inside Your Backpack Or Duffle Like A Pro. The Semi-Translucent Fabric Makes It'S Easy To See What'S In Each Dry Bag. Other Features Include A Non-Wicking Hypalon Roll-Top Closure, An Oval Base To Prevent The Dry Bag From Rolling Away On Sloped Surfaces And Taped Seams To Keep Moisture Out. An Excellent Choice For Lightweight Backpacking, Cycle Touring And Travel.Specifications:- Robust And Extremely Light Bluesign® Approved Ultra-Sil 30d Cordura® Nylon Fabric- Find What You Need Fast Through The Translucent Fabric- Oval Base Prevents Rolling And Packs Efficiently- Slippery Finish For Easy Packing And Unpacking- Pfc-Free Dwr Finish- Best Use: Backpacking- Closure: Non-Wicking Hypalon Roll-Top Closure- Shape: Oval BaseTechnology: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.Cordura:- Cordura® Is A Special Type Of Nylon Yarn Used For Its Strength. These Yarns Are Used In Two Different Product Areas:- In The Siliconized Ultra-Sil™ Fabrics Used In Ultra-Sil™ Dry Sacks, Stuff Sacks, Compression Sacks, Pack Covers, Travelling Light And Travel Essentials Products- In The Foot Section Of The Extremely Tough Event® Quagmire Gaiters.