Oakley sweatpants. Regarding the size, it says S in the 6th image, but it's a Japanese size M. Made of sturdy sweat fabric, so I think you can wear it regardless of the season. It's in relatively good condition, but it's a used item that a child has worn, so please understand this before purchasing. The scent of fabric softener remains, so please refrain from purchasing if you don't like fragrances. If you have any other questions, please comment.