The Kid's Patagonia Capilene Silkweight T-Shirt features a regular fit and is made from stretchy fabric consisting of 84% recycled polyester and 16% spandex jersey, providing 40+ UPF sun protection. The smooth jersey material feels comfortable against the skin and easily slides under layers, with flat-seam construction throughout to prevent chafing. This short-sleeved top includes forward-shoulder seams, set-in sleeves that reach the elbows, and underarm gussets to enhance movement and comfort, while a drop-tail hem offers additional coverage.