Proton Crew Pullover Men's narrow mouth metal-button closure and a zip

metal-button closure and a zip fly

The waist belt is ergonomic and features our Pull-Forward system to create a snug

The toecover can be worn on its own or as a layer between your shoe and shoecover

cuffs and hem offers premium comfort and durability for lasting wear

Proton Crew Pullover Men's narrow mouth metal-button closure and a zipHikes, approaches, backcountry tours, a day at the crags the exceptionally versatile Proton Crew gives you lightweight warmth, temperature regulating airflow, and freedom to move. Soft and comfortable, ultralight Octa Loft insulations combination of warmth and breathability maintains thermal comfort. The air permeable Fortius Air 50 outer is light, durable, and has performance stretch. A DWR treatment repels moisture. Midlayer or standalone youll wear