Enter for a chance to win Sea to Summit Gear made tough with Cordura Fabric. made with Cordura fabric, sea to summit’s super durable ultra-sil gear helps make your pack a little lighter and your trek a little easier. this month, enter to win a Sea to Summit prize pack featuring the following durable products: ultra sil compression dry sack 10L, ultra-sil view dry sack 13L, ultra-sil dry sack 8L or ultra-sil day pack.