PU rain footies by mikk-line are made from 100% recycled PU (Polyurethan) on the outside and lined with soft microfiber polyester fleece on the inside. These warm footies are designed for babies, who have not yet learnt to walk. They need flexible footwear without soles to ensure that their tiny baby feet move naturally and develop strength without any restrictions. The footies offer a comfortable and secure fit, and they are easy to put on and take off. Just pull them over the pants to keep the feet dry and warm, as the little one gets close to wet grass or sand. You will find them in various colours, so you can get one that match the rainwear. EXCELLENT & FUNCTIONAL DESIGN- Solid-coloured.- Spacious design. - Elastic opening. - Elastic strap around the ankles. - Reflective logo.TECHNICAL ADVANTAGES- Waterproof (water pressure 8,000 mm). - Semi welded seams (critical seams only). - Windproof.- Insulating with anti-peeling fleece lining. - Wear-resistant material. - Dirt repellent.- Easy-to-clean. - OEKO-TEX® Standard 100 (Class 1).SIZE GUIDEInsole length in centimetres. Remember to account for 1-1,5 centimeters for the feet to grow.Size 74 = 12 cm.Size 80 = 13 cm.Size 86 = 14 cm.