I bought this product to help with walking and aerobic exercise. While the belt fits perfectly around the waist, the sheath doesn't. The pouch is made of stretchy material as well as breathable fabric, which is good because it helps with sweat build-up and the like. However, to support the testicles, the pouch is too large at the bottom and does not support them enough for real protection. I love everything else about this product and if it wasn't for the oversized pouch I would have given it full stars.