When you want to throw something on and know youre goingto be warm all day long, this is it. Thanks to Pertex® Quantumfabric, its durable against the elements and the lightweightfabric makes it ideal for layering up. Synthetic Hydroloft®Polyball insulation is the secret behind this vests warmth.Its breathable too so youll stay fresh on the go. Did wemention its compact for packing away and its zipped pocketswill keep your essentials safe? A unique and durable wardrobestaple which always offers superior warmth.