LUNIWEI Neoprene 3mm Water Sports Swimming Scuba Diving Surfing Socks S... Neoprene Imported Material: Neoprene. Color: Black,Blue. Thickness: 3mm. Not harmful to users, chemical glues not use. Warm, elastic and comfortable to wear. Magic tape for easily buckle or adjust, good water entering prevention. Perfect water sport accessory for protecting your feet from scratch and prick. Healthy barefoot walking and hard to be come off in the water, very sutiable for divers and body surfers.