If you ride your bike to work or around town The ultra-light Patagonia Black Hole 8L Sling Bag provides easy everyday storage and easy carry. Asymmetrical seat belts will not bounce or slide when you're driving down the road and an expandable elastic pocket on the belt allows you to keep your phone or energy bar handy so you don't have to slow down to reach what you need. With an eight-liter capacity and two-compartment design, this bag holds small essentials and durable ripstop fabric provides durable, water-resistant protection to keep your items protected in rainy weather. Plus you have breathable mesh on the strap and back panel which will help you stay cool when summer storms give way to hot and humid weather.