Zipper on the back. Maintenance: Hand wash. The lining is made of fabric with OEKO-TEX® 100 and GOTS certification. OEKO-TEX® 100 certification means that fabrics have been tested for harmful substances and are safe for human health. The GOTS certificate goes a step further, ensuring that the raw materials for the fabrics are grown ecologically clean and that the entire production process is carried out in accordance with high social criteria and in an environmentally sustainable manner. The fabric production process is friendly to nature and soil.