evo.com | Arc'teryx Vests > Chilly mornings at basecamp or brisk afternoons on the trail - the Arc'teryx Cerium Vest has you covered. This featherweight wonder packs a punch with its 850 fill down insulation, keeping your core toasty while leaving your arms free to move. Slip it under a shell or wear it solo, then stuff it away smaller than your water bottle when the sun decides to make an appearance. Insulated Mid-Height Collar Mapped Down and Synthetic Insulation for Moisture Management Trim Fit with Articulated Patterning 850-fill Recycled Down Standard (RDS) Certified Down 15D Arato(TM) Dope Dyed Nylon Shell | Arc'teryx Cerium Vest Men's 2025 - X-Small Purple | Nylon