Lowe alpine airzone z 20 backpack description traditional styles which have remained largely the same over the last 30 years are testiment to this the airzone z is a compact trekking and hiking daypack in a tried and tested clam shell design featuring our extremely breathable airzone back system ensuring the pack remains comfortable even when packed full with a heavy load a versatile stretch mesh front pocket adds valuable storage space and a zippered top pocket provides secure storag