Universal CompatibilityRe:Flex baseplates are universally compatible with all major mounting systems.Cushioned ComfortRe:Flex FullBED cushioning maximizes comfort and minimizes fatigue.Adjustable LeanDialFLAD system lets you adjust the forward lean angle of the hi-back with the turn of dial.Durability and ConsistencySingle-component baseplate, hi-back, and buckles are more durable and consistent in their response and feel.