Reviewed by Darren, Shrewsbury. - 16th Oct, 2020 A really well designed, comfortable, all year round daysack! A really well designed, very comfortable, 35 to 45 litre, all year round day-sack, that expands to allow to walk longer trails in comfort. The adjustable back and harness means it can fit most people (ladies'ND option available). The Air Zone Pro is hydration bladder compatible, as well as having external mesh pockets for bottles and handy, quick access goody pockets on the hip belt. Really good for hot days on a trail, with a very breathable Air Zone back and spider cage to dry clothes/towels on the go. The top and side access and trekking pole holders help make a great walk all-rounder!