Triple Eight"s Second Skin Elbow Pads offer flexible and unobtrusive protection without the bulk that often accompanies protective gear. Instead of a hard plastic shell, the Second Skin Elbow Pads are constructed with abrasion and tear resistant Kevlar foam padding in front. These elbow pads are great for the parks, the streets and even the slopes.To ensure a perfect elbow pad fit, measure the circumference of your elbow with your arm outstretched and match to the sizes listed below:S 6 - 8 inchesM 8 - 10 inchesL 10 - 12 inches