Neoprene is a scuba knit fabric, strong with incredible stretch as well as stain resistance and general durability. Our double sided neoprene cosmetic bags are the absolute perfect travel or big bag organizer. With two separate pouches, each with a clear side so seeing internal contents is incredibly easy. We love this for moms too, one side for kid stuff: band-aids, wipes, small medicines and creams and one side for mom needs: ponytail holder, hand sanitizer, lip balm and a small brush. Both sides finished with separate top zip closure.