Here's what other sites are saying:
The Arc'teryx Men's Proton LT Vest is lightweight Insulation for your core. When moving fast in changing temperatures this Softshell vest is air-permeable and insulating to adjust during those conditions. The trim Fit surrounds your core, over a base layer and willing Fits under a shell to act as a midlayer. Features of the Arcteryx Men's Proton LT Vest Fortius air 40 outer fabric effectively balances air permeability, wind and water resistance Resilient coreloft continuous 65 Insulation Collar height provides coverage when worn without a hardshell 2 Insulated hand pockets, 1 chest pocket No slip zip keeps the main zipper from self opening Dual hem adjustments seal in warmth
Part soft shell, part insulating mid layer, the wind-resistant Arc'teryx Proton LT men's insulated vest balances weather and thermal protection for comfort in a wide range of temps and activities.
Arc'teryx Men's Apparel Clothing Proton LT Vest - Mens Black Small 306209. With Fortius Air 40 outer fabric you will warm and comfortable all day. Perfect for alpine ice expedition rock climbing.
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