This 25 liter example from the Less Is More series is full of smart detail. - Airback carrying system with great airflow - bluesign certified 70D*140D diamond ripstop polyamide - Side stretch pockets - Hip belt pockets - Space and ports for a hydration bladder and hose (not included) - Front panel elastic for overpacking and compression - Flap pocket - Chest strap - The hip belt is wide and well padded The bottles and hydration bags shown in some images are not included in the price.