KevenAnna Resistance Loop Bands - Fitness Exercise Bands Set of 4 - for Improving Mobility, Strength, Yoga Anywhere -Set of 4 with various resistance levels: red (light), blue (medium), green (heavier), black (heaviest) -Versatile and unisex - Work for crossfit, yoga, pilates and strength & mobility training; suitable for either men or women. -Premium - Made of selected eco-friendly latex material to ensure its being dural with long service life. -Portable- with the extra carrying bag, its pretty portable and enbale your sue wherever and whenever you want. Use them at home, in the gym house and take it together when u r outing or on trip. -Risk-free Purchase Guarantee - If you are not happy with our product for whatever reason, just return it to Amazon for a full refund. Click 'Add to Cart' and have it right away!