Compression and organization with minimized additional weight. Perfectly organized luggage made easy: the Ultra-Sil Compression Sack from Sea to Summit! This compression sack ensures space-saving, ultralight, and well-organized storage. Its four sturdy straps compress bulky gear by up to two-thirds without significantly increasing the weight of your luggage. This is made possible by the fine, water-resistant, and bluesign certified Ultra-Sil 30D nylon with its PFC-free coating. Clever details of the Ultra-Sil Compression Sack include side-release buckles for quick and easy opening, and the flip-top lid design that prevents strap tangling. Key features at a glance: robust yet lightweight construction, sustainable materials and processes, and thoughtful details for optimal handling.