Made of sleek compression-fit nylon, the armguard features a rubber protection piece that is incredibly durable, yet very soft and flexible. The protective piece is sewn on to the armguard in recessed channels. Easy on, easy off for a very comfortable fit! Available in 3 sizes :Small 8" long, large end circumference 9" stretchedMedium 9" long, large end circumference 11" stretchedLarge 9" long, large end circumference 13" stretched