Cool graphics in a stretch polyester interlock fabric the Spyder Treeline 1/4 Zip Boy's Top is a stretchy featherweight sweater when paired with a baselayer, and a heavier baselayer when paired with a midlayer, giving it versatility through the entire season. And it looks very sharp. The sort of thing you can pop him into and take him out for an evening of fun at the resort to cap off an exciting day. A versatile piece with many layering possibilities in a wicking, breathable, quick dry fabric for effective thermoregulation when he’s out there working hard in the cold.