Arcteryx Proton Lightweight Hoody Arcteryx Alpha SL Glove DCM is where synthetic insulation

DCM is where synthetic insulation is used instead of down in areas prone to moisture - the collar

Hydration bladder compatible

Removable external helmet carry system

The underarms feature pit zips for heat venting and a no lift gusset construction meaning the jacket does not lift when you raise your arms

Arcteryx Proton Lightweight Hoody Arcteryx Alpha SL Glove DCM is where synthetic insulationThe Arcteryx Proton Lightweight Hoody is a super light insulating mid or outer layer designed for spring and summer conditions when you may need a little extra warmth. The Proton Lightweight is made from 20 denier Fortius Air 20 outer which is impressively durable for its low weight. Fortius Air 20 balances air permeability for breathability when you are working hard, with light wind resistance. The insulation is a light layer of Octa Loft knit