Uniqlo UNIQLO 321-400483 (74-01) Waist 82cm - The outer material is a stretch cotton twill. - Three-layer construction of outer material, windproof film, and fleece lining blocks cold wind. - Excellent breathability to release moisture inside the garment. - Slim tapered silhouette with less space between the fabric and the legs, providing a warmer feel. Outer: 99% cotton, 1% polyurethane / Lining: 100% polyester Regarding the photo of the back, the button on the back pocket is only unbuttoned and is properly attached. The inside is fleece-lined. There are fold wrinkles, but they will stretch out.