Help keep your little one comfortable in this Infant Crib Bootie, crafted from Premium Timberland® leather and a ReBOTL™ fabric lining that contains at least 50% recycled PET plastic. It's complete with a convenient hook-and-loop closure to help keep a secure fit and a soft leather outsole. By purchasing this product, you are supporting Leather Working Group certified tanneries https://www.leatherworkinggroup.com/ The ReBOTL™ material used in Timberland® apparel contains at least 40% recycled PET (recycled polyethylene terephthalate, the stuff plastic bottles are made of). The ReBOTL™ material used in Timberland® footwear and accessories contains at least 50% recycled PET. (Excepting trace materials)