Using your GEOSMINA 15 - liter bikepacking seat bag is easy. First, adjust the double - reinforced Velcro straps to secure the bag tightly to the seatpost. Make sure it's well - balanced to avoid any wobbling while cycling. You can use the adjustable bungee on the top panel to add extra items like a jacket or a small tool kit. When packing, place heavier items at the bottom for better stability. For safety, consider installing an LED light on the Hypalon - reinforced rear panel or using auxiliary straps as needed. As for maintenance, after each trip, wipe the bag down with a damp cloth to remove any mud or dirt. If it gets wet, let it dry thoroughly before storing it. Avoid exposing the bag to sharp objects to prevent tears. This way, your bag will last for many cycling adventures.