Milled in the USA wicking polyester mesh. Longer front zipper for off the bike “hang out” normalcy. Rugged and light YKK hidden zipper. Soft hemmed sleeve for a smooth transition from jersey to skin. Durable polyester “doughnut approved” three pocket back design. Classic set-in sleeves construction with low profile collar. 35 UPF rating means your torso is safe in the sun. Designed in San Francisco and sewn in California. Worn once.