The Altura Arc Roll Top Pannier bag is a great all rounder and will always keep your content dry. The roll top design is one of the most practical and one of the best to keep your possessions dry. The Arc Roll Top has been constructed from light weight and durable materials for long lasting great quality pannier. With this Arc Roll Top all of the seams are ultrasonic welded to ensure that the pannier is fully waterproof leaving the content always safe and dry. That’s not the only feature which makes this pannier stand out from the crowd. With reflective trim you are certainly more noticeable to pedestrians and vehicles at night, its always recommended to use lights when riding at night. Altura have used the same great quality pannier fixing that they use on most of their pannier bags, the Rixen Kaul pressure fit. You simply just push into place, making sure it is sturdy and not moving anywhere then you pannier is firmly fixed to your rack. Over all this pannier is great looking and it is certain to keep whatever is inside dry, a reliable and long lasting water proof pannier bag.