7 idp flex knee padthe flex knee offers excellent value for money while featuring most of the 7 idp innovations competitive pricing will make this a go to pad for any rider features hard wearing durable nylon spandex knee cover double layer polygon perforated custom foam to increase air flow and reduce weight upper calf muscle adjustable strap to prevent pad from slipping center adjustment strap provides even tension above calf muscle and around top of pad one piece foam section covers front