Whatever you’ve got going on, the Phantom II is ready. With a water friendly synthetic strap, a super soft padded jersey lining and a tough but light rubber sponge outsole, you can get there faster. Or take your time – whatever. Beach freely! The Reef PHANTOM II Mens Sandals in Dark Brown feature a synthetic upper, EVA lining, and rubber sole. They are slip-on, lightweight, and have a flat heel. The sandal style is flip-flops.