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Alpinestars Youth SX-1 Knee Protector

Serious knee armor for the serious motocrosser. Where conventional knee/shin guards protect mainly from roost and slides onto the knee, the Alpinestars SX-1 Knee Guards actually brace the knee joint against injuries that can be caused by an especially hard or awkward landing. Using a Dual Gear System with integrated hinge gears, the Alpinestars SX-1 Knee Guards offer protection against hyperflexion without limiting mobility. The shin and thigh plates are perforated for breathability, while the polyurethane patella cup uses a floating design to maintain coverage and viscoelastic padding for comfort.


  • Upper and lower frames are constructed from a high performance polymeric material blend for optimized levels of flexibility and strength as well as excellent weight saving properties
  • Polymer protector plates are strategically perforated for maximum breathability and air ventilation
  • The shell integrated dual pivot hinge gear system follows the natural movement of the knee for dynamic fit and mobility
  • Upper extended frame for increased thigh protection without compromising mobility
  • Patella construction features floating protection cup for continuous coverage and mobility regardless of leg position
  • Patella cup constructed from energy absorbing viscoelastic PU foam knee cup that is CE certified to Type A
  • Patella cup is backed by soft padding for adaptive fit and breathable air mesh for ventilation and comfort
  • Highly abrasion resistant fabric on the outer central knee-cup area reduces the possibility of scratching
  • Thermoformed foam backing for excellent comfort against the skin
  • Frames are asymmetrical and feature a slim, ergonomic design for comfort and a performance fit
  • Hook-and-loop / TPR dual-strap closure systems for easy in and out and a personalized fit
  • Straps feature Airprene for optimized comfort and airflow
  • CE certified knee brace EN 1621-1:2012 K type A (level 1)
Read More
Product Style Item # Store SKU Manufacturer Product # Availability
Product Style Youth SM-MD Item # 1314704 Store SKU Manufacturer Product # 6546319-10-S/M Availability Available: Requires 3-5 business days of lead time prior to shipment
Product Style Youth LG-XL Item # 1314705 Store SKU Manufacturer Product # 6546319-10-L/XL Availability In Stock: Ships within 24 hours