Two Tuck Wide Trousers - KhakiFrom the Maker These trousers are made of "Uniform Twill" fabric, the Mercerizing process, which is passed through low temperature caustic soda at the fabric stage to strengthen the fabric and give it a glossy and crisp appearance. The "Uniform Twill" Fabric is a fabric derived from the uniform of THE U. S. MILITARY ACADEMY AT WEST POINT in New York State. Size Guide (unisex) 0 XS, 1 S, 2 M, 3 L, 4 XL Mens model wears a size 4.