Proton FL Arc'Teryx
Climb, run, hike – choose your day. An insulated hoody created to give you the freedom to explore your way, the light, durable Proton FL’s breathable thermal protection delivers comfort across a range of temperature and output levels. Octa® Loft knit insulation provides warmth and allows airflow to help regulate comfort. Abrasion-resistant Fortius™ Air 20 fabric stretches, resists wind, and breathes. Articulation aids mobility, and the low-profile insulated hood fits comfortably under your helmet.
Updated with improved Octa® Loft knit insulation and resized stretch chest pocket.
Size and Fit Tips: Fitted Fit - This trimmer fit is patterned to stay close to the body through the chest, waist, hip, and thigh. Its low profile eliminates bulk, moves with the body, and fits comfortably over our first layers. This model's fit has evolved. Before you check out, please make sure to reference our sizing chart to determine your correct size.