Our on-line store is open 24/7 and we ship Monday through Friday, excluding some holidays. Orders received for products without shipping restrictions on its product page will ship the same business day when received before 12:00 p.m. PST. Orders in high demand will have an estimated production time listed on its product page and will ship according to the date listed.
Compact and superlight, our lightest Atom vest easily stashes in your pack, ready to grab when summer temperatures drop. Worn as a midlayer or standalone, it delivers moderate insulation perfect for early morning runs and taking in the view from a freshly bagged peak. The Tyono™ 20 shell balances breathability and wind resistance, and the Coreloft™ insulation is light, compressible, and efficient. Lightweight stretch fleece side panels improve ventilation and hold the fit.
•Size XXS, XS, S, M, L, XL, XXL
•Weight 155g / 5.5 oz
•Fit Fitted
•ATOM
Versatile synthetic insulated mid layers with a high degree of weather resistance.
•SYNTHETIC INSULATION
Man-made insulation with quick dry times, durability and retains warmth when damp.
•DOPE DYE
Adding pigment at the polymer level which saves water, reduces C02 emissions and increases fabric colourfastness.
•MULTI-USE
Versatile high performance designs for diverse activities and conditions.
We are a Seattle, WA based outdoor gear store with a mission to make climbing, backpacking, skiing & mountaineering accessible and enjoyable for everyone.
© 2026, Master Store