Adidas NMD. The adidas NMD has created a completely new technical standard among sneakers with the innovative BOOST soles. These are the first cross-country ski boots to be developed as lifestyle sneakers and not athletic shoes. Upper: Textile - is a lightweight material, which is offered in a very wide color scale and is mainly used for summer footwear. Midsole: Boost. Sole: Rubber - a material that is very easy to maintain and you will appreciate it especially in rainy weather.