Knox Aegis Back Protector Removable breathable liner made from spacer fabric and EVA for extra air flow and added performance. Machine washable for continued freshness CE certified to the newly revised Motorcycle Back Protector Standard EN1621-2:2014, the Aegis passed Level 2 and passes both high and low tests, +40C and -20C making it suitable for use in all conditions, including Winter sports. *Multi activity back protector. Perfect for use under a motorcycle jacket and also in other sports, ski, mountain bike and snow board *Flexible sliding spine protection moving freely over the shock absorbing honeycomb ensuring maximum coverage *The Aegis has a superior air ventilation system *Open cell technology for superior air flow to keep riders cool *Multi position waist strap system to give the best individual fit *Extra side adjustment straps give a more secure fit against the spine *Quick release soft shoulder straps can cross over for increased comfort. They also give a fitting system for an optional *Low profile design constructed to be lightweight and breathable but without loss of performance *Kidney pads for added performance *The largest choice of 7 sizes to fit, children, ladies and men *Additional coccyx protection available on the 8 Plate Race *Optional CE Approved Chest protector can be purchased separately *Colour  Black *Sizes relate to torso length and so it is important to measure the torso length