The Ultra-Sil 5L Stuff Sack is an ultralight, durable organizer made from water-resistant, Bluesign-approved Ultra-Sil 30D nylon with a non-PFC DWR finish. It features a reinforced base pull handle and an easy-operate drawcord with a Capture Cord Lock for secure closure. The slippery fabric and secure base handle allow for effortless sliding in and out of packs.