Using the codes luggage30 and bankholfree this bag miraculously comes down to only £8.99 which is a bargain for any Jansport bag. [No doubt a voucher/pricing error as it shows up as a staff discount]
They are normally very comfortable and distribute weight well on the straps.
Some stuff from the website:
Trinity III 30L Daypack. Foam shoulder straps with breathable mesh. One main compartment. Zippered accessory pocket. Extra large front panel pocket with organizer keeps essentials handy. Padded grip handle for increased comfort. Dimensions: 50 X 34 X 15cm. Capacity 30L