If youre having trouble picking between a light and medium volume pack then going with a 20 liter is a great way to split the difference between the two. Made from water resistant, ripstop polyester the Heli Pro 20 is built to last and handle anything you can throw at it. Thanks to dedicated sleeves for your snow tools, theyll be easily accessible in the event of an emergency. Other features include a fleece lined pocket for your goggles or sunglasses, A hydration sleeve that doubles as a laptop sleeve, Diagonal/A-frame ski carry, and an external quick stash pocket round out this rugged backcountry bag.