Smartwool Men's Perfect Crew Short Sleeve Tee Deep Navy

Merino wool is a natural fiber known for its moisture-wicking properties and comfort. It provides good insulation and is generally well-regarded for its performance in various conditions.

Nylon is a synthetic material that can contribute to microplastic pollution. While it adds durability to the fabric, it is not biodegradable and can leach microplastics into the environment.