We've used a clever mix of lycra and polyamide to create a material that helps to reduce vibrations in the muscles which in the long run allows the wearer to go for longer, harder and with less muscle fatigue. They have been designed to fit perfectly under your outer shorts and the length is short to reduce rubbing with knee pads. Talking of going for longer and harder we've used a high density 10mm Marathon pad so you'll be comfortable even if you are riding all day. To further increase comfort all the potential rubbing areas have bonded seems to reduce friction and decrease pressure points.