Arc’teryx Phase SL Zip Neck
Material
The Arc’teryx Phase SL Zip Neck is made from Phasic SL fabric, a featherweight technical material.
Design
This is the lightest baselayer in Arc’teryx’s lineup. It has a trim fit that does not negatively impact my mobility and is treated with Durable Anti-Odor technology.
Comfort
The fabric is very smooth and friction-free against your skin. Because it’s so thin and lightweight, it dries quickly. The zip-neck lets me dump heat quickly, and the seams are flat to prevent chafing.
Protection
The Phase SL zip neck fabric has UPF 25+ protection.
Minimalist
The Phase SL has a sleek look with subtle branding. The only logo is on the left shoulder, which was long burned off after many runs in the dryer.
My Uses
Cold-Weather Hiking and Running
The Arc’teryx Phase SL zip-neck’s ultralight fabric is perfect as a base layer under an insulating mid-layer like the Atom LT or Proton LT mid-layer. It keeps moisture off your skin, preventing a clammy feeling during winter hikes. For cold running in the North (I live in Dallas), I always use a thin technical base layer like the Phase SL and a light polyester fleece like the Caliber.
