Cotton/Polyester/Welltex® • Unisex Fit • Crewneck • Short Sleeves. Many people today suffer from upper body soreness, back and joint pain. Stiffness/tenderness of the large muscles around the shoulders, upper arms, and elbows/forearm/wrist are also a common complaint among many. Whether managing chronic pain in your joints, or combatting stiff and uncomfortable muscles, these are products that can help. Our state of the art therapy product called Welltex® can reduce pain and chronic inflammation.