Alpinestars - SX-1 V2 knee guard features:

• Extremely lightweight knee protection with a large protective area offers riders the most breathable and lightweight protective solution for all riding styles.
• 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 upper and lower frame feature an integrated dual pivot hinge gear system that follows the natural movement of the knee and keeps the protector well positioned during all movements.
• Upper extended frame for increased thigh protection without compromising mobility.
• Perforated knee protector offers high levels of ventilation.
• Knee protector is backed by soft padding for an adaptive fit with breathable air mesh for ventilation and comfort.
• 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 dual strap closure system with silicon pull tabs for easy in and out and a personalized, secure fit.