The AL Pullon works all year round, as a winter base layer, or as a light mid layer & the simple design, stretchy fabric & shorter zip makes it a pleasure to wear. The AL Pullon has a slim cut to hug your body ensuring maximum performance from the fabric & the nice long arms with thumb loops provide completely unrestricted movement. The Polartec Power Dry fabric wicks moisture superbly &, as the name suggests, it dries phenomenally quickly. The fabric has a bi-component knit construction with different yarns on either side of the fabric. The inside is optimised to move moisture away from the skin, & the outside to dry quickly. To help reduce the build-up of bacterial odour the AL Pullon is treated with Polygiene, a naturally occurring antimicrobial agent that lasts for the life of the garment. Polygiene is completely safe next to the skin & is environmentally friendly. Polartec Power Dry High Efficiency fabric Polygiene stay fresh odour control Deep venting YKK chest zip with chin guard Close fitting stand up double layer collar Flatlock low bulk seams Slim fit