Made of Polartec® Power Wool™, which uniquely isolates plush merino wool on the inside, and a high-stretch technical knit on the outside. This harnesses the natural thermoregulating powers of wool while significantly improving its resilience. 

Merino wool’s marvelous isothermic properties derive from the dramatic temperature variation the sheep endure in Australia and New Zealand. This enables headwear that has a warming effect when it’s cold, yet is also pleasantly cooling when it’s warm.

- amazingly ultralight (24 g!) and compressible
- single-layer design in a classic skull cap silhouette
- supple externally-folded minimal hem with stretchy flatlock seam
- high-stretch fit 
- smooth and flexible design easily interfaces under a helmet, or conforms over a cap
- exceptionally durable and easy to care for, with natural odor resistance