Climbers Therapy Band

Essesentially a large rubber band of varied strengths to help climbers warm up, and treat injuries. 

Used in a vast array of warm up routines thera bands can work small muscles and help keep injuries at bay. Common place in climbers the elbows and shoulders get abused to the point of surgery. If used in a religious like manor before any session you'll help small, more delicate muscles engage for greater stability and injury prevention.

Read any good climbing performance guide book and there will be a mention of these handy tools.