Kayak tie down straps are those long webbing loops with ratchets that keep your boat secure on a roof rack or trailer. They need to be tight enough so the kayak doesn't shift on a sharp turn, but not so tight that they dent the plastic. Most people cross them over the hull in a crisscross pattern for stability, and always tuck loose ends in so they don't flop around in the wind. kayak tie down straps 4