Can be rolled and squeezed into tight spaces – the fabrics used are very abrasion resistant and the double bladders will withstand significant pressure Bladders themselves are Mylar, and are completely after taste-free: they are based on the same material used for wine bladders 420 D ripstop nylon exterior Easy one-handed operation Easy one-handed operation Hang this from a tree at the campsite and you have bulk water literally on tap! Great for groups, kayaking or whenever you have to carry a lot of water. Multiple Hypalon lash points allow you to hang or secure the Pack Tap in many spots.