Arm Sling UniversalKey Features Strap has hook and loop closure for easy adjustability Massaging ergoBeads hand exerciser and neck shoulder comfort pad enhances comfort Breathable mesh design is lightweight and encourages air flow The patent pending IMAK Arm Sling features a massaging ergoBeads hand exerciser and neck shoulder comfort pad. ErgoBeads are exceptionally smooth plastic beads that glide comfortably against your skin. This creates a massaging effect to help