Thera Roll 3.5x12 Foam Roller. Sure, we'd all love to have a personal sports therapist at our disposal after every grueling training session or race. But dreaming won't make the pain go away, so get your hands on one of these amazing Thera Roll Foam Rollers and go for some DIY sports therapy. The unique textured design penetrates and releases tense muscle fibers, decreases muscle stiffness and reduces pain. Grey Hard model provides competitive athletes with aggressive release of sore and fatigued muscles. Purple Firm model provides more moderate release.