Review on Gregory Mountain Products Backpack MERCURY Outdoor Recreation for Camping & Hiking by Bruce Marable

That was exactly what I was looking for for a day trip. I bought a Gregory 3L 3D Hydro Tank from him. I took it to REI and they measured me and I was very comfortable on the hike. The guy there said that the weight should be mostly on your hips. To check you've got it right after everything is tightened, let go of the strap and you should feel the weight shift to your shoulders. The goal is to keep the weight on your hips. I like the color and it's very spacious.