Kinesiology therapeutic tape. Endorsed by Gold Medalist Kerri Walsh. Join the Community: kttape.com/forum; facebook.com/kttape; twitter.com/kttape. Watch the videos: kttape.com/instructions. Synthetic. Elastic sports tape. For pain relief and support. Prevent injury recover faster play harder. For Common Injuries: carpal tunnel, hamstring strain, wrist pain, runner's knee, neck strain, calf stain, shoulder pain, Achilles tendonitis, tennis elbow, plantar fasciitis, golfer's elbow, shin splints, rib pain, ankle sprain, gluteus pain, quad strain. Cotton or synthetic? Cotton: Comfortable to wear; 1-3 days of wear; good level of support. Synthetic: Comfortable to wear; 4-7 days of wear; best level of support; reflective safety print; protective case; water proof. Made in China.