Ultra-Sil Compression Sack 35L Size:XL We've extended the durability zones

We've extended the durability zones to make them cover even more of the sock - offering the same comfort with even more strength

the Capitan is Black Diamond's bomber

Hiking doesn't always mean epic plans or ultra-technical gear

and metric and standard rulers

And because they're made with ZQ-certified Merino wool

Ultra-Sil Compression Sack 35L Size:XL We've extended the durability zonesWhen 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.