Pretty big for a 24 - Gregory Miwok 24 Daypack - Men's

I needed just a bit more than my 20L day pack and this with its outside water bladder space gives me a LOT more room. Straps are not quite as comfortable as my Deuter but still solid. This is great for long day hike or overnight and big enough for when i want to travel carryon only, it'll fit under the seat. Wish they'd make this type of bag with a front access to main compartment.