The brooks challenge large tool bag is a great way of storing essentials or spare tools on your bike whilst being super stylish too the sleek leather that is used on the bag gives a sophisticated look and is designed to last much longer than most other saddle and handlebar bags thanks to its genuine leather the bag has a new fitment to the rear to create it into a saddlebag or loops for over the handlebar use the challenge large bag has much in common with the previous models but this time