RAD Roller Stiff/Deep Tissue Peanut Massage Tool/Eco Friendly Silicone/for Neck, Upper Back, Thoracic Spine, Psoas, Self Myofascial Release, Massage and Mobility/BlackIDEAL FOR pre and post workout, yoga, travel, body maintenance, muscle tightness, muscle pain (jaw, neck, shoulders, back, hips, legs, hands, feet), personal training, increasing performance, athletes (soccer, tennis, volleyball, running, cycling, hiking, swimming, basketball, football, baseball, weight lifting, body building, etc;), flexibility, health and wellness, etc High density made of high quality silicone that grips the skin and wipes clean