Amazon.com | KuaiLu Men。Sole Material; Rubber Outer Material; Pu Closure Type; Slip On Water Resistance Level; Waterproof Wide And Thick Sole With Arch Support,very Comfortable Foot Feels;canvas Band,not Easy To Broke Rubber Buttom Sole,anti-skid. Arch Support Add A Extra Layer Eva And Rubber Sole Between Outsole And Footbed,give You A Comfortable Feel Every Time You Slip Your Feet Into The Sandals. Salt Water Would Corrodes Rubber,rinsing The Slippers With Clean Water After Travel,it Will Be More Durable.if It Bothers You,you Could Spray Them Or Let Them Air Outside. Very Convenient For Beach Or Travel;suitable For Hawaii Party,pool Party,indoor,outdoor Sports,walking,it Is Suitable For Spring, Summer ,especially For Summer Wear.