I purchased the bag only because I had the Pintler pack and I'm able to now swap between the Pintler day bag and the Beartooth 80 bag on the frame. Did a 7 mile 2000ft elevation gain into the high backcountry and the size of the Beartooth 80 bag gave me plenty of room for all my gear. I love how many straps the bag has and especially like organization of the bag the hood made it much easier to get to my daily items like water filter, food, Headlamp, and still had room to spare in it. Wish the bag had a little better organization in the main compartment like a separate area in the bottom for my sleeping items but not a big deal just a wish. Planning on doing a 5 day backcountry mule deer hunt and this bag with definitely do the job. Great product by Mystery Ranch.