【2020 Newly Improved & Upgraded Resistance Bands】- THLAND New upgraded resistance bands use the latest poly-cotton technology with soft, durable fabric. A thickened inner layer with non-slip latex wire keeps it from slipping, rolling or breaking. Helps you tighten and tone your hips and legs. Work toward a beautiful figure and effectively relieve pressure and fatigue. 【3 Improved Powerful Resistance Levels】-Consumers expressed concerns regarding resistance levels being too tight/too loose. We took that into consideration and made improvements to perfect resistance levels: light, medium & heavy. Made more effective to meet your exercise needs for arms, feet or legs; use for P90X, CrossFit, Yoga, Insanity, Pilates or Beach Body workouts. 【Widened & Thickened Soft Material】-Unlike rubber and latex bands, NVRGIUP exercise booty bands are 3.1” Wider and 0.12” thicker than regular thrust strength bands that non-rolling, non-curling, non-slip. And the soft knit surfaces won't rub against your skin so there is no need to readjust the hip circle bands during indoor and outdoor sports and fitness.