Good streamlined day pack. Could be used overnight in summer with the right gear(See my upload). Bladder system is amazing, slides in easy even when full. Bite valve seems pretty loose and I think it will leak, hopefully not bad. Light pack with a bunch of pockets on the outside and even an integrated rain cover that comes out of the bottom. Pretty expensive but considering it has a top notch hydration system and rain cover, I don't mind paying that much for osprey. Very happy with the purchase, I have no doubts that the manta will be my go to day pack.