Alpinestars Sx-1 Youth Knee Protector

• 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 four-point hinge system follows the natural movement of the knee and keeps the protector well positioned in all riding positions.
• Patella cup is constructed from an energy absorbing viscoelastic PU foam.