KYLIN SPORT 2 In 1 High Density Deep Tissue Point Massage Power Grid Yoga Pilates Foam Roller Set for Physical Therapy Made of EVA foam,Lightweight,soft to touch,rich elastic buffer,surface With Massage Grid Trigger Point Large roller size: 13" x 5" , small roller size :11" x 4" . Fits Conveniently Inside Your Sports Bag Massage Your Muscles, Self Myofascial Release, Release Muscle Tightness, Relieve Soreness and Pain, And Exercise Your IT Band With Just This Foam Roller Set Roller divided into 4 sections for continuous pressure Roller's Unique Ribbed Shape Design Provides Better Penetrating Massage Versus Basic Smooth Foam Rollers.