Everything in this collection is free of Soy, Bamboo, and Wool. The bra in this collection does contain spandex. Items with zippers and snaps contain finishings of metal and/or plastic. If you are going for 100% natural, everything else in this collection should be safe for you. Please leave us a note during checkout if you want your order to be Spandex, Bamboo, and Soy free, so we know to not use these fabrics even for ties on wrap skirts and such. If you want to read more about these all-natural materials and how they might help your skin, read this blog post.