GU striped five-sleeve T-shirt. Made of a polyester and cotton blend, it's not just cotton, so it dries easily, which is convenient. It's a moderate thickness, so you can wear it in any season except mid-winter. The sleeves are long enough to cover your upper arms. It has slits, making it easy to move in. - Brand: GU - Material: 60% polyester, 40% cotton - Design: Striped - Sleeve Length: Five-sleeve - Color: White/Black Thank you for viewing. I've worn it a few times, so there is some pilling. I didn't see any stains or dirt to the naked eye. Thank you very much.