Wearing it under an outer garment increases heat retention. It's thin, so it doesn't add bulk. Hand-sewn by my grandmother. Because it's hand-sewn, it fits gently to the body. It's made with extreme care. ☆ Outer fabric: cotton ☆ Lining: bleached cotton ☆ Filling: kimono cotton Even cleaning rags feel stiff when machine-sewn, but hand-sewing makes them feel truly gentle, doesn't it? We will compress it for shipping, but it's made with silk floss, so it will return to its original shape. Togari, the model for Spirited Away, has a long history of wearing neko-hanten (cat-style padded jackets) in the winter. It's so light you'll forget you're wearing it, and it's warm. We hope you'll enjoy using it.