OutdoorGearLab

The Arc'teryx Proton FL Hoody is a jack-of-all-trades hybrid for those who want something extra from their softshell. This jacket is a perfect companion on windy days, multi-pitch rock climbs, or high on alpine walls in the summer. To be honest, there is very little this jacket can't do: it is lightweight, has great mobility, and with an ultra-soft fleece lining, it is super cozy, even next to bare skin. The new hood is fully fleece lined and more spacious than previous iterations. Whether you need a layer for alpine or multi-pitch climbing, insulation for ice climbing, or a breathable but decently warm layer for backcountry or cross-country skiing, mountain climbing, or hiking, this ingenious mid-layer is a great one to add to your kit.
Our review team noted very few drawbacks to this otherwise feature-rich jacket. For long rock climbing routes, it can be helpful to have a stow-away pocket with a loop to clip to your harness. Sadly, the Proton FL does not have this feature, so if you need to stash your jacket mid-route, you'll have to get a stuff sack specific for the job. The revised version of the jacket has some sleeve slippage between the fleece lining and the shell fabric when you pull it over long-sleeved shirts &#40;especially fleeces&#41;. All that aside, if you need a cozy mid-layer with breathable insulation, the Proton is an excellent choice. 

The Arc'teryx Proton FL Hoody is a jack-of-all-trades hybrid for those who want something extra from their softshell. This jacket is a perfect companion on windy days, multi-pitch rock climbs, or high on alpine walls in the summer. To be honest, there is very little this jacket can't do: it is lightweight, has great mobility, and with an ultra-soft fleece lining, it is super cozy, even next to bare skin. The new hood is fully fleece-lined and more spacious than previous iterations. Whether you need a layer for alpine or multi-pitch climbing, insulation for ice climbing, or a breathable but decently warm layer for backcountry or cross-country skiing, mountain climbing, or hiking, this ingenious mid-layer is a great one to add to your kit.
Our review team noted very few drawbacks to this otherwise feature-rich jacket. For long rock climbing routes, it can be helpful to have a stow-away pocket with a loop to clip to your harness. Sadly, the Proton FL does not have this feature, so if you need to stash your jacket mid-route, you'll have to get a stuff sack specific for the job. The revised version of the jacket has some sleeve slippage between the fleece lining and the shell fabric when you pull it over long-sleeved shirts &#40;especially fleeces&#41;. All that aside, if you need a cozy mid-layer with breathable insulation, the Proton is an excellent choice. 
Read more: Arc'teryx Proton FL Hoody review

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