Alpinestars Bionic Flex Knee Protector MX Boots simply spin it up clockwise

simply spin it up clockwise completely around until it comes up into a position a little lower than before

seal and spacer

anti-microbial liner and quick-release cheek pads for all-day comfort

Fiberglass composite shell in four shell sizes with multi-density EPS liner for lightweight protection and a tailored fit

Kit includes 2 bearings

Alpinestars Bionic Flex Knee Protector MX Boots simply spin it up clockwiseWith ergonomically profiled Nucleon Flex Technology protection held securely in position via an elasticated top strap and silicon hems, the Bionic Flex Knee Protector incorporates comfort padding with a soft touch stretch mesh which prevents heat build up. The asymmetric and lightweight design ensures this knee protector provides optimal levels of comfort and freedom of movement