Gaiam Restore Muscle Massage Therapy Foam Rollers (18 inch & 36 inch) SEMI-FIRM DENSITY: Foam roller offers a medium density with minimal muscle stimulation PERFECT SIZE: 18-Inch length allows for double arm and double leg work to soothe soreness effectively LOOSEN TIGHT MUSCLES: Roll your way to a stronger, healthier you by helping to improve mobility and relieve stress INCLUDES: 15-Minute 'How To' digital workout is included to help get you started DIMENSIONS: 18"L x 6" Diameter / Weight = 0.96lbs