Your new favorite midlayer is super soft and comfortable. The clean and simple crew design performs on hikes and comfortable days in the city. Its the kind of top you want to wear every day. We added a zippered pocket for safe storage. The Men's Evolved Air Crewneck Midlayer is made of 100% polyester, which makes it easier to recycle at the end of its life cycle when disposed of properly. This midlayer contains Ocean Bound recycled materials, which are sourced within 50km of a coastline or main waterway in regions at risk of plastic pollution. See composition for more details.