For big days and overnight trips: this 24-liter backpack from Columbia is designed for comfort and functionality. The adjustable hip belt, chest strap, breathable padded shoulder straps, and Airmesh back panel provide plenty of flexibility and comfort while you're on the go. Useful features like the side pocket for water bottles, loops for trekking poles, and the stowable rain cover ensure that you always have all your essentials within reach.