Each resistance band is made of 100% natural latex (TPE free), is odor free and has a different strength so that you can increase the intensity of your workout graduallyImprove muscle tone in arms, legs, ankles, back & buttocks without need for expensive gym memberships or exercise equipmentStraps are 12" long so they can be stretched further - Great for Stretching, Warm-Ups, Home Workouts, Physical Therapy, Yoga, Pilates & Crossfit!Flexible bands are lightweight, durable and compact so you can take them along in a purse or briefcase in the included carry bagSet of 5 top quality exercise bands come with complimentary printed manual, handy travel bag & 100% lifetime satisfaction guarantee