Great modularity, lightweight, and well built. Whether you’re going on a day hike or an extended stay the F1 Mainframe has you covered from their long line of modular bags and accessories.

Well engineered frame and back pack system.

Just used this on a 5 day elk hunt it was 90 degrees two of the days and we put this pack through the wringer! Packed a big bull out with the batwings and really enjoyed everything this pack has to offer!

Very well made pack, makes carrying loads much easier!!!

Everything I was needing for Colorado elk hunts

The Eberlestock F1Mainframe provides endless expandability options to take me from Whitetail hunting in the Allegheny’s to Elk hunting in the Rocky Mountains and beyond.

I love that this pack is made for taller people. I am 6'6" tall and it fits my torso super great. I haven't healed anything with it yet except for a couple of neices and my son but it seems to keep the weight where it should be!

Only a few miles on the frame so far. I have used it with the vapor 5000, zip on dry bag, and zip on bay wings. Have not carried out an animal on it yet, but have been archery hunting steep country in the south San Juan’s of Colorado and it’s been a real back saver.

I love it. I’m am not kidding I freaking love this frame.

We’ll made. Shipped fast. Can’t wait to use it

Great frame that is extremely comfortable. I've used it on four trips now, all over 7 miles with about 40 lbs, and it's paired with the Vapor 5000 and bolt action scabbard. I haven't packed any meat yet, just scouting while carrying a rifle if I see a bear, but I have no reason to doubt it will function just fine. The rubber on the bottom part of the frame must have had something rubbing on it and it's worn off a little, but that's probably my fault as I didn't have the pack secure enough.