As warm as it is stylish, the Billabong Boundary Mock Half-Zip Jacket is built to be worn by itself as a standalone outer layer or underneath your waterproof jacket to trap heat and wick moisture. When worn by itself, the DWR coating will protect you from light precipitation while the pockets will keep your necessities nearby. As a midlayer, the ability of the polyester fleece to both wick moisture and trap heat ensures you'll be adventuring in all-day comfort.