The Ultra-Sil Compression Dry Sack compresses bulky squishable gear and keeps it dry inside your pack. Made from Ultra-Sil 30D CORDURA Nylon fabric with an eVent fabric base, the air can be rolled out but can’t get back in. Sea to Summit retained all the clever functionality of the original compression dry sack, with all the lightweight touches of the Ultra-Sil technology.
It’s an ideal option for use inside a backpack during longer lightweight hikes, adventure travels, cycle touring and any activity where you need to maximise pack space by compressing your bulky items to one-third of their volume while keeping it dry. It employs waterproof seams, a non-wicking roll-top closure and is super lightweight.
Ultra-Sil is a very light nylon fabric. The outer shell is surrounded by a silicone layer; the inner layer is PU coated.