Natural latex is odor free, elastic, easy on skin, and does not twist up. The more comfortable helpers, the more workout you enjoy. The more you enjoy, the better result and persistence you will earn. For scientific training, 5 graduated strengths is marked with max strength values. 1 set is enough to help work out your whole body, both big muscle groups and small muscles. fits easily into the travel pouch provided; small and lightweight that you can use at home whenever you have a moment and take it with you to the gym and anywhere you go.