100% polyester Features: Comfortable fit due to the back seam. Lightweight, quick-drying, and cool, this product is perfect for the hot season. The "HiCool" material used in this uniform has high sweat absorption and moisture-wicking properties, keeping the skin feeling comfortable and non-sticky. Its high breathability also makes it effective for training in the summer. This is a jersey uniform with a rare "back seam tailoring" for ease of movement and a beautiful silhouette. The size is unknown because the tag is torn, but it fits me, who am 172cm tall, perfectly, so I think it's around 2.5 to 3.