While it hasn't been used many times, the cotton material has caused some fuzzing on the straps. Otherwise, the inside compartments are clean. Size: Approximately H55 x W38 x D13cm *Harness strap: Approximately W50-90cm A large-capacity backpack perfect for travel and business trips. The main compartment opens like a suitcase with a butterfly opening, and a mesh divider allows you to organize and store a large amount of clothing. It also has an expansion function, allowing you to adjust the storage capacity by approximately 35%. It is equipped with a round zipper tech compartment with a large pocket, designed for easy access when needed. It is also equipped with a sub-compartment with an organizer panel, suitable for storing accessories. The size allows it to be carried on board, so you don't have to worry about extra fees. * The independent tech compartment with a large pocket can store up to a 16" MacBook Pro with a brushed lining. * It has an expansion function that increases the capacity of the compartment by approximately 35%, and side compression belts further support expansion and contraction. * The sub-compartment has multi-function pockets, including pen holders. * The front panel has a large zip pocket with fluorescent yellow for increased visibility. * The shoulder straps are ergonomically designed, and the chest belt reduces the load on the shoulders.