The vest is one of the most underrated pieces in any layering system. By insulating your core without restricting your arms, it gives you warmth exactly where your body needs it most — with none of the bulk. The vests available at Mountex are sourced from brands that have mastered lightweight insulation, whether in down or synthetic fill. Perfect as a standalone layer on cool days or tucked under a shell when temperatures really drop. One of those pieces you reach for more than you expect.