The Sea Eagle Explorer Kayak is as tough as nails and as rugged as the men and women who choose it. Stem to stern, it’s constructed of tough 1,000 denier polyester-supported high-pressure fabric with quadruple-thickness electronic-welded seams. How tough is the Explorer Kayak? In torture testing, we pounded it mercilessly with the claw of a claw hammer. It had no effect. Neither did stabbing it with a screwdriver. We simply couldn’t penetrate the “crocodile hide” hull.