I used it as an inner down jacket. It's thin but warm, and it's compact, so it was convenient to carry around. I haven't worn it that many times, but there's some pilling on the sleeves and three pen marks. From the Uniqlo website ↓ Uses light and warm Airtech sheet padding. ・Machine washable, so you can wash it in the washing machine, even if it gets dirty from playing. ・Made with thin nylon, it weighs less than 100g, providing a very light feel and a soft texture. ・Pocketable design for compact storage and easy carrying. ・It can be worn casually like a cardigan, so it's convenient to carry one for adjusting a baby's body temperature. ・Comes with a convenient name tag and hanger loop.