Alpinestars: Knee Protector – EN 1621-1:2012 Level 1.Extremely lightweight, durable and flexible protector constructed from breathable stretch mesh for a comfortable, close fit.Highly convenient and time-saving slip-on design with elasticated cuffs and silicone printing to prevent slippage and help keep the protector securely positioned.New design interlinked cell protectors are highly perforated and secured in a mesh pocket for excellent breathability and core cooling.Abrasion resistant fabric front panel.Rollable design means the protector can be rolled when not in use or stored in the pouch supplied or in the back pocket of a riding jersey.