Comfortable long pants in size 150B, made of 75% cotton. - Size: 150B - Material: Main body: 75% cotton, 22% nylon, 3% polyurethane / Ribbing: 62% polyester, 33% nylon, 5% polyurethane Thank you for viewing. These pants are size 150B and made of stretchy material, so they are easy to move in and comfortable to wear! Also, the inside is like a thin brushed fleece, so they are perfect for the coming season (⁠◍⁠•⁠ᴗ⁠•⁠◍⁠) However, the elastic in the waist is twisted inside, and there is some wear and tear, so please understand this before purchasing.