With invaluable feedback input from the legend himself, these Sam Hill Lite Knee Pads are the holy grail of ultra-lightweight knee pads, perfect for hitting the trail and race days.SUPERLIGHT/SUPER THIN - At just 6mm the Sam Hill Lite Pads are the thinnest CE EN 1621-1:2012 certified pads on the market. Ideal for trail riding or wearing under your race pants the Sam Hill Lites offer comfortable, breathable protection in a super-light package.COMPRESSION FIT - Designed to keep weight down the compression fit, the slip-on design fits higher on the thigh than most pads. An internal silicone strip keeps the pads from slipping down.BREATHABLE SOCK - Compression square line Ripstop Spandex fabric allows for a durable lightweight feel along with great airflow.Size Guide (Thigh): Measure circumference of the thigh, 6" (15.25cm) above the kneecap.Small: 38-43cmMedium: 43-48cmLarge:  48-53cmX-Large: 53-58cm