Dakine Heli Pro 25 backpack, with built-in back protector. It has pockets for all your day trip backcountry accesories as well as a soft goggle pouch, and can the front wrap can be used to mount either skis or a snowboard for when you're hiking uphill. Compatible with all major hydration bladder brands, with internal routing for the hose.

Selling because my wife bought an avalance backpack that covers the same use case.