INTEX Seahawk II has SUPER-TOUGH™ construction, is resistant to damage from abrasion, impact, and sunlight, and is unaffected by gasoline, oil, and salt water. The Seahawk II's SUPER-TOUGH™ construction is triple strong. Made with 3 separate layers of material for extra strenght and durability - two outer layers of heavy-gauge pvc laminated to an inner layer of polyester mesh for extra reinforcement.