The Thule Shield pannier 13L mounts easily to your 8-16 mm bike rack and once installation is complete, they can be attached and detached in mere seconds. The reflective elements and bike light attachment loops provide visibility in the dark to keep you safe while the three interior pockets keep small items organised. These panniers have a certified rating of IPX4 on the internationally recognised IP waterproof scale, which means they are highly water-resistant in heavy rain and will keep your items dry. For any bike trip, these bike panniers provide an easy and convenient way to bring your gear.