Ergonomic Exercise Blocks Gripitz reduce stress on the wrists and elbows, and enables people with repetitive stress injuries to exercise more comfortably for a longer, more productive workout. Gripitz are great for Yoga, Pilates and any exercise performed with weight on your hands. Each pair costs $40.00. You can find them at: http://www.yogaprops.net/Merchant2/merchant.mv?Screen=PROD&Store_Code=yp&Product_Code=%23GZ&Category_Code=13_irreg