I did a day hike yesterday with this pack and loaded it down with around 30-35 lbs. This pack felt awesome. I could not tell the pack was on my back. The suspension of this pack works extremely well. At first the packs shoulder straps rubbed my neck and was not real sure about it. Keep in mind I have a muscular build with a thicker neck. Then I loaded the pack down and adjusted the straps to my liking and they worked out perfectly. It sits different when its empty but then again it's made to be loaded down. Very light weight pack. Going to purchase the Axios 50 for longer trips. Highly recommend this pack! Thanks Arc'teryx for another great light weight pack. Keep up the good work!!!!