This foam is compatible with Pelican’s DLX transport kit bars (PS1957). They are sold separately to allow you to replace only your foams instead of buying a complete kit again. They will allow you to transport safely your kayak or SUP The pad is made of EVA. EVA is a very flexible and elastic component that offers better shock resistance when traveling with your kayak/SUP EVA foams also have adhesive properties that ensure the pads stay in place on your car while you are driving. They also come with a additional anti-slip material that's provide better grip. Simply place them on the roof of your car and install your boat This includes 1 soft foam pad (7 x 4 x 3.5in./18 x 10 x 9cm) that can be installed on the cross aluminium bars