The Ultra-Sil Pack Liner keeps the entire contents of your pack dry. Ideal for use in situations where a pack cover may be impractical (for instance where a cover may snag on undergrowth, or for external frame packs where a cover may not fit over the pack). The pack liners is shaped to fit the internal contours of a backpack, so the base is oval, rather than round, and the liner has an overall tapered shape. Made of PU coated siliconised CORDURA fabric Opens wide for easy packing when inside a pack Non-wicking Hypalon roll-top closure with stiffener at the top for a better seal Double stitched, tape sealed seams Uses low profile buckles