Jam with security and comfort in both slippery or coarse & painful skin shredding cracks! HAND JAMMIES feature wide elastic finger loops, extra padding across the knuckles (gotta love that), and most importantly a thin layer of famous sticky rubber on the entire back of your hand - which will instantly improve your crack climbing. A split leather cuff with carabiner clip-in hole & hook-n-loop wrist straps lock you in... but easily allows removal for belaying chores or the next face pitch. Make HAND JAMMIES part of your rack - for increased performance, comfort and greater protection. For best sizing, measure your hand - from the base of your index finger to your wrist (heel of your hand at base of thumb). Sizing corresponds to range below. When on boarder line - go up to next size - loose is better.