Bought it for amarnath yatra trek although didn't carry this bag uptill the holy cave. But it is heavy for high altitude trecks. If you have strength and you are strong enough to breath properly with all that weight. It is recommend 2.5 kg (. Can be lowered if you remove the underlying steel supports, which are removable) but deshapes the bag. And awesome thing is the amount of baggage that you can carry. It is even good for 6-7 days tours and even flights.