The SeaMaster offers double buoyancy chambers manufactured from a specially formulated polyurethane (PU) proofed nylon fabric. This fabric is highly resistant to abrasion and impervious to corrosion in the marine environment. ValiseIt is far more durable than rubber-based fabrics, and the reduced need for repairs results in considerable savings in servicing costs. Welded seams, which are significantly stronger than glued seams, give the raft an extremely rugged construction