I've finally had a chance to use it and loved it. Comfortable and great quality. The flexibility with the various packs and accessories make it perfect for me for both day and overnight trips.

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