Tensile safety 3-4 times, 100% high quality latex material, if you don't like it, broken please contact with us, we can refund all money to your account, or re-deliver a new product ;Trust us , we are real sellers,to all my buyers are satisfied is our business aim ! It is very effective and easy to use, consisting of a contoured foam coated plastic handle and foam pedals to nicely fit into your hands and around your feet. Ideal for toning & strengthening stomach, waist and legs, arms, hips, thighs and works on the tummy at the same time. Portable and light weight, easy to storage and can be used anywhere anytime. Lose Weight Fitness Equipment: Exercise your arms, shoulders, chest, back, legs. Perfect for Crossfit ,Yoga & Fitness Classes.