The lightest, most breathable option in our Insulation Collection, the Proton SL Hoody takes the guesswork out of warming up on cold climbs and other high-output activities in cool conditions. The knit insulation holds its loft and shape—no matter how often you stuff it into the bottom of your pack. More importantly, it allows your body to breathe, so you’re not left a sweaty mess after you have to step on the gas to get through the crux.

What's been updated: Updated with recycled Fortius™ fabric for improved durability, and chest pocket and design lines that align with the Proton Collection.

Features & Specs
Technical features

Moisture-resistant outer face fabric

Breathable

Lightweight

Durable

Construction

Fortius™ Air 20 face fabric effectively balances air permeability and weather resistance with lightweight durability and stretch

Octa® Loft breathable insulation provides thermal protection

Design & Fit

Fitted, with articulated patterning for mobility and comfort

Garment Centre Back Length: Size S is 27"/68cm - Varies by size

Fabric treatment

FC0 DWR (Durable Water Repellent) finish repels moisture and is PFAS-free

Hood configuration

Helmet compatible

Adjustable insulated hood

Pocket configuration

Two zippered hand warmer pockets

Single stretch woven zippered chest pocket

Sustainability

Contains materials that meet the bluesign® criteria

PFAS (Per- and polyfluoroalkyl substances) Compliant