Matador Meggings are made from a completely odor-free fabric. You can wear them multiple times to work out and as long as you air them sufficiently between each use. Let them to air dry right after wearing them rather than putting them in a plastic bag. As gross as this may sound, we tested these garments by wearing one pair to 20 sweaty bootcamp classes without washing and there was absolutely no smell. Unfortunately, we didn't have the stomach to continue testing beyond it but you get the point.