The knee and shin area is reinforced to protect the wetsuit against accidental scratches. Made of flexible double-lined Neoprene 3 mm thick. Check out my other items. This item is in the category "Sporting Goods\Water Sports\Wetsuits & Drysuits\Wetsuits\Men". The seller is "scubamonkeydivecenter" and is located in this country: US.This item can be shipped to United States.