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Alpinestars Bionic Flex Knee Protector

The Alpinestars Bionic Flex Knee Protector features ergonomically profiled Nucleon Flex Technology protection held securely in position with an elasticated top strap and silicon hems. The Bionic Flex Knee Protector also 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.


  • Extremely lightweight, durable and flexible protector constructed from a breathable stretch mesh for a comfortable fit
  • Convenient and time saving slip-on design with elasticated hems and silicon printing to prevent slippage
  • Nucleon Flex Technology protectors are highly perforated and secured on the outside of the sleeve for excellent breathability and ventilation
  • Additional side foam padding for additional coverage
  • Abrasion resistant fabric front panel for increased durability
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Product Style Item # Store SKU Manufacturer Product # Availability
Product Style SM-MD Item # 1829612 Store SKU Manufacturer Product # 6505121-13-S/M Availability In Stock: Requires 1-2 business days of lead time prior to shipment
Product Style LG-XL Item # 1829611 Store SKU Manufacturer Product # 6505121-13-LXL Availability In Stock: Requires 1-2 business days of lead time prior to shipment