Heavy Duty Elasticated Velcro fastening Knee Wraps. Ironworks Knee Wraps are designed to give un rivalled support during hardcore leg workouts, these extra long wraps are made from heavy duty elasticated cotton that provide support and allow movement while giving you the confidence to really up those poundages on those killer squats and leg presses. With the addition of velcro fastening these knee supports are offer the ultimate fit and support for all serious athletes and are an essential accessory for every leg workout.