The Fjällräven Abisko Wool LS Men's T-Shirt combines merino wool and recycled polyester to provide temperature regulation and moisture management. It is soft to the touch and durable, ideal as a base layer for colder weather. With wool's natural ability to suppress odor and synthetics for quick drying, it is ideal for multi-day hikes. The T-Shirt is PFC-free and uses traceable wool.