Thin fabric. It looks like a stain, but it might be part of the fabric. Soft rayon material gray pants, comfortable fit. - Brand: GUNIT FASHIONS - Size: 1X - Material: 95% Rayon, 5% Spandex - Color: Gray Please refer to the measurements below, as the size is indicated in overseas sizing. Measurements are taken by a layman. 【Size】 (cm) Flat Lay Waist: 50 Hips: 68 Rise: 40 Inseam: 64 *There may be slight errors. ⭐️Anonymous & Free Shipping⭐️ All items are one-of-a-kind due to overseas import ☆ Instant purchase OK.ᐟ‪‪.ᐟ #Chi-chanVintageClothingList✨ #Chi-chanVintageTopsList✨ ----------------------------- * The listed items are for reference. Please check the actual images before purchasing ♫ * Will be shipped in simple packaging. * Please understand any folding wrinkles during storage and shipping ✨ ----------------------------- Imported vintage clothing USA Stylish Vintage Women's One-of-a-kind Sweat fabric Loose fit, oversized 02-104