The waist button area has a unique design. These are simple straight pants. The fabric is soft and thin. For someone 160cm tall, the length is ankle-revealing. I usually wear size L, but these pants are size M, and they have enough room to wear thin leggings or tights underneath. Measurements (laid flat): Total length: Approximately 87 cm Waist: Approximately 36 cm Rise: Approximately 32 cm Inseam: Approximately 58 cm Made of: Rayon 37% Polyester 36% Wool 25% Polyurethane 2% Hand washable Upon close inspection, the area around the stomach appears slightly fuzzy. Personally, I think it's not very noticeable because it's black. Also, there is some stretch. They are thin and have a smooth feel. Will be shipped in simple packaging.