Foam Roller Massage Stick:21" foam roller stick with ergonomically designed handle; heavy duty high desity EVA foam; Enhaces physical strength, endurance and flexibility; great for conditioning muscles before strenous workout; relieves muscle knots and relaxes tired muscle. Hot & Cold Foot Relief Roller: Designed to be used hot or cold; instatnly relaxes tired feet; eases plantar fascilities; enhances circulation. Hot and Cold Massage Kit:Use hot or cold; relieves muscle tension; improve circulation