By using a combination of Coolmax® Active fabric by DuPont® in conjunction with TPro® Dual Layer Armourflex CE approved armour, this Forcefield product offers unparalleled comfort and protection for a multitude of different sporting activities. The 4-layer short is rated to double the European CE standard, at 100 joules. The redeveloped shorts have armour in pockets, and were extensively developed and tested prior to their release. Many improvements over previous models, and even better wearing! Excellent fit. All armour is removable, so they fit into your leathers easily and can be washed when needed. Excellent worn with knee braces or utilizing the existing knee armour in your pants or race suit. Very, very nice: nothing offers this kind of protective coverage, and the comfort is amazing. Wear them under jeans or casual pants with knee guards, too, for even more protection.Pro Armour - 4 layer (100 joule rated)