1.5mm neoprene upper and instep 1.5mm neoprene upper and instep Smoothskin ankle cuff keeps sand and dirt out Flatlock stitching prevents hotspots and friction points Vented sole allows water to drain Tatex outsole provides outstanding grip in wet or dry conditions Uses: Stand up paddle, surfing, kayaking, canoeing, windsurfing, jetskiing, boating, beach running, lake-river-beach walking, sailboarding