Engineered to keep the salty sea breeze at bay, but equally at home battling fresh mountain gusts, the deck half zip from Amundsen Sports is a versatile mid-layer with sturdy good looks. As you'd expect from one of Norway's most desirable brands, there's no skimping on quality here. The 12-gauge knit is a blend of organic cotton, merino wool and nylon, and it's designed for rough, active wear. A zip neck helps you vent heat easily, and they've added elbow patches to eke out the lifespan of the garment. Pull on your sailing wellies, grab the tiller and motor out into the fjords.