Sea to Summit Ultra-Sil Compression Sack - When you need to compress volume without significantly adding weight, the Ultra-Sil Compression Sack is an excellent solution. Made from a 30D diamond rip-stop siliconized CORDURA fabric they can be compressed to one third of the original volume. 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. Extra long straps so these sacks can really be filled to capacity 12 straps for even compression Extra long straps so these sacks can really be filled to capacity Bar tack reinforced stress points Pull handle on the bottom Slippery finish for easy packing