Sibba Neoprene Water Fin Sock Pull on Booties 3mm with Traction Perfect for Water Sports Snorkeling, Scuba, or Swim (;XL( US Men 10.5-12 )) Size information: S(US Men 5-6.5);M(US Men 7-8);L(US Men 8.5-10);XL(US Men 10.5-12) Healthy barefoot walking and hard to be come off in the water, very sutiable for divers and body surfers. Perfect water sport accessory for protecting against cold, old, sharp objects and sand Anti slip bottom and tightened velcro buckle closure. Not harmful to users, chemical glues not use. Durable, stretchy and comfortable to wear.