Bilt Defender Pro Knee Guards The Bilt Defender Pro Knee Guards utilize a hinged hard shell exterior and fully perforated high density foam interior to create comfortable and effective protection. Thigh cuffs and elastic straps with hinged protective knee caps provide joint ...Bilt Defender Pro Knee Guards The Bilt Defender Pro Knee Guards utilize a hinged hard shell exterior and fully perforated high density foam interior to create comfortable and effective protection. Thigh cuffs and elastic straps with hinged protective knee caps provide joint flexibility and secure fitment Features: Hinged hard shell exterior covering knee and shin Fully perforated high density foam for max venting Breathable, wicking, poly-lining Thigh cuff and elastic strap with hinged protective knee caps for joint flexibility and secure fitting Elasticated straps with slide buckle integrated One size fits most