Our knee protectors by Red Dragon are designed for HEMA. They feature a hard plastic outer shell and are padded on the inside. They are designed to fit into the knee pockets of our Red Dragon HEMA sparring pants but can be worn independently thanks to the elasticated strap with Velcro attachments on the back. They also feature an elasticated cord at the top, designed to attach them to your pants for a more secure fit. Length: 5" (13cm) width: 6.7" (17cm) depth: 2.3" (6cm) weight: 3 oz each (104G each) all dimensions are approximate and may Vary from piece to piece.