The WEST BIKING Reflective Bike Bicycle Double Panniers Bag Trunk Bag 33L is a high-quality, durable and spacious storage solution for cyclists. Made from nylon material in sleek black colour, this trunk bag is designed to protect your belongings from the elements while out on your bike. With reflective features for added visibility, this pannier bag is perfect for commuting or long-distance cycling adventures. The 33L capacity provides ample space for all your essentials, making it an ideal choice for cyclists looking for practical and reliable storage options. please note It is not described on tags as completely waterproof so you may need an extra cover for torrential rain but it wouldn't definitely be fine for the odd light shower.