This high Visibility rucksack cover is ideal for the commuter going through towns to dark country lanes in the dark times of the day. Constructed from fully waterproof with taped seams, the Deluxe HUMP keeps the content of your bag safe and dry. The day-glo fabrics feature highly reflective chevron prints and stripes to give you superb daytime and night time visibility. located on the back of the cover is a small mesh pocket which is ideal for a small loop rear light, for that extra bit of visibility to other road users and pedestrians. The elasticated binding and elasticated snap buckle fasteners ensure that the Hump fits snugly over your backpack or pannier bag for a custom tuned fit. please note that this is a large option and can fit rucksacks from 15 – 35 litres.