Thank you for viewing! I think this can be worn both inside and outside. You don't have to worry about wrinkles, and it's easy to pack for travel as a change of clothes♪ I bought it to wear as an inner layer for a jacket, but I haven't had a chance to wear it, so it's been stored in a condition close to new. Brand: NATURAL BEAUTY BASIC Size: L 100% polyester Three-quarter to seven-eighths sleeves There are no noticeable stains, but Please consider purchasing if you understand and accept that it has been stored at home.