Arcteryx Proton Hoody Arcteryx Bird Head Beanie The Octa Loft breathable insulation

The Octa Loft breathable insulation insulation provides exceptional warmth for its weight

The windproof and breathable Pertex outer enhances durability while remaining compressible and packable for alpine missions

Single later TPU mesh upper

so the glove provides a good level of grip on a variety of surfaces

Essential items

Arcteryx Proton Hoody Arcteryx Bird Head Beanie The Octa Loft breathable insulationThe Arcteryx Proton 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 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 Coreloft Compact 80 air permeable insulation