Alpinestars: The knees are particularly prone to injury when riding a mountain bike, the new Evolution Knee Protector offers strategic abrasion and impact protection thanks to the rip-stop fabric reinforcements for added resistance. Its pre-shaped sock-like design improves comfort and reduces riding fatigue while the extremely lightweight, durable and flexible protector constructed from a stretch mesh gives excellent levels of fit and breathability.• CE certified Knee protector against EN 1621:1 LEVEL 1 offers strategic impact protection.• Extremely lightweight, durable and flexible protector constructed from breathable stretch mesh for comfortable, close fit.• Convenient and time-saving slip-on-design with elasticated cuff and silicone printing to prevent slippage and help keep protector securely positioned.• Pre-shaped, ergonomic design for optimized performance with various riding positions.• Strategically positioned rip-stop fabric reinforcements for abrasion resistance and added durability.• Additional impact and scratch panel on the lower leg for strategic coverage in key area.• Laminated perforated padding for a better comfort breathability and weight-saving.