The Blackburn Outpost Seatpack Seat Pack & Dry Bag is a fantastic alternative to panniers or a backpack when you need to carry necessities with you on your ride. It's waterproof to protect from the elements and expandable for the times you need more space. Ideal for mountain bike overnight trips, but also works will for commuting or long day trips. | Blackburn Seatpack Seat Pack & Dry Bag