The Arc'teryx Proton SL Hoody is the perfect solution when you need a layer of warmth during sweaty and intense outdoor activities. The knitted insulation keeps its shape - no matter how often you stuff it into your backpack. And the material lets your body breathe so you don't get wet during intense activities and freeze afterwards.

- Moisture-resistant outer material
- Body-hugging fit with anatomically pre-shaped cut for mobility and comfort
- Adjustable insulated hood
- Two zippered handwarmer pockets
- Two zippered chest pockets made of stretch fabric