K a sweatshirt sweater: long-sleeved shirt is made shirt Yarn: 95% Organic cotton / 5% spandex - Machine wash at 40 degrees, do not tumble dry. - Only 4 stars because of impaired care properties through the 5% elastane. ---- Nice Shirt - Stretch, medium weight T-shirt yarn, thus probably worn in all seasons. -. Washing and wearing properties not yet been tested.