From mountain peaks to desert towers to coastal cliffs, spring and summer weather conditions in wild places are constantly shifting with changes in elevations, exposures and ecosystems. Choosing the perfect insulation piece is as challenging as predicting the weather.

Staying comfortable during the seasons most notorious for surprising temperature swings and microbursts prompted Arc’teryx to reinvigorate its new assortment of spring weight insulation pieces for Spring ‘18.
Created for a variety of spring and summer activities that require different performance traits, Arc’teryx reveals a comprehensive assortment of minimalist insulation layers using specialized materials and constructions. Each piece is built to perform efficiently in cool evening conditions, early morning alpine starts or for comfortably sitting atop the summit.

SUPERLIGHT SYNTHETIC INSULATION
Ideal for most of active summer pursuits – from climbing to trekking – the new Atom SL Vest features the lightest weight Coreloft Compact synthetic insulation with its quilted 40gsm construction. Designed to dry quickly and retain warmth in humid and wet conditions, the Atom SL Vest’s hybrid construction features a wind-resistant and DWR treated main body with air-permeable fleece side panels for ventilation.
With unprecedented attention to detail and thoughtful, simplified features, the trim fitting Atom SL Vest weighs only 140 grams and compresses down into its own pocket to fit easily into a small waist pack or running vest. Two zippered hand pockets help for additional hand warmth while also keeping small items secure. The patented No-Slip-Zip™ front zip keeps the zipper from slipping open when you only want to “crack” the collar for a bit of excess air flow and heat release.
Perfect for chilly summer mornings and evenings, the extremely versatile Atom SL Vest performs well as an insulating mid layer while also providing ample protection for active use as a standalone outer layer.