These Bike Series packs are designed with bicycles and motorcycles in mind. Heavy duty 840D fabrics are used to handle rough city use. The Bernal and the Van Ness are compatible with Modular Lightweight Load carrying Equipment MOLLE for short. All packs in this series use Boreas' patent pending Super Tramp suspension system, which lifts the weight off your back, allowing air to flow between you and the pack to keep you cool when on the move.The Bolinas 30 L Backpack by Boreas is an incredibly comfortable, stylish, and bike friendly roll top that converts to a load hauling daypack. Stretch panels throughout the bag allow the pack body to expand and curve depending on the load and suspension setting. Perfect for the daily commuter or the weekend adventurer.