Ultra-Sil Pack Cover

Ultralight cover protects pack from the weather The Ultra-Sil Pack Cover ends the debate about whether you should carry one or not. It's a tiny and compelling solution and the medium size weighs less than four ounces. Plus it packs into its own small stuff sack - why wouldn't you carry one? *RECOMMENDATION: If you stow any gear externally on your pack, we would recommend buying a Pack Cover a size larger than normal. FEATURES Made of 30D Ultra-Sil™ fabric constructed from CORDURA® yarns for durable, waterproof performance. This pack cover does not use seam construction to ensure that it is completely waterproof Packaged in its own mini siliconized Nylon stuff sack that remains attached to the cover so it can't get lost Keeper strap (sizes S-L) pulls the pack cover tight across the pack harness Sold in four sizes to fit daypacks up to large backpacks SIZE GUIDE X-Small: Fits a 15 to 30-liter pack Small: Fits a 30 to 50-liter pack Medium: Fits a 50 to 70-liter pack Large: Fits a 70 to 95-liter pack TECH SPECS BEST USE  Ultralight Backpacking MATERIAL(S) 30 denier Ultra-Sil™ nylon WATERPROOF Yes FAQ Aren't most backpacks waterproof without a cover? No. Water will enter through seams and zippers (especially in really wet parts of the world) Why choose the Ultra-Sil Pack Cover over the Nylon version? The Ultra-Sil Pack cover is slightly lighter and has a smaller packed volume - it is more suitable for weight-conscious backpackers Will a pack cover make my pack completely waterproof? In most cases, waterproof enough - wind-driven rain can still enter through the space between your back and the harness