Wear & Away products are made of 100% polypropylene material. It is hypoallergenic and tested for use on skin. It is non-flammable. It is a recyclable material, but soft and strong enough to be used as a garment for limited wear. While our fabric is water repellent and resistant, it is not completely waterproof. If you are a heavy sweater and like to sleep in our sheets in the buff - please place a towel or plastic barrier beneath the sheet set to be completely sure no tanning solution comes through. We make our pants from a heavier fabric - if they feel stiff - wash them before use and they will soften right up! We are proud to say all of our products are made in the USA!