The OLLIEPACK is a seat bag from SWIFT INDUSTRIES, a bicycle bag company based in Seattle, Washington. Through rigorous testing, the saddle rail straps and wide seatpost strap with high grip have been optimized to reduce bag sway, which has always been a challenge. This is a bike-packing style seat bag perfect for adventures on single tracks and rough terrain. The main compartment features a waterproof roll-top closure. A stretch mesh pocket is provided on the outer bottom, allowing for storage of wind jackets and snacks. Made with 100% recycled polyester, the ECOPAK material is lightweight yet highly durable and waterproof. It is an advanced material manufactured with the utmost consideration for the environment in each process, including raw materials, adhesives, and water-repellent coatings. Material: ECOPAK Maximum size (with the mouth rolled three times): Top width 15cm, Bottom width 5cm, Height 14cm, Depth 51cm Capacity: ~6L