Altura: Our largest seatpack is fully waterproof and with a capacity of up to 17 litres is perfect for bike packing adventures. Helping you stay aero and efficient on your next bikepacking trip. The outstanding Vortex 2 seat pack holds the essentials while keeping them protected from an assault of the elements.Fully waterproof and in a lightweight design with a durable welded seam construction. Complete with the Hook & Loop mounting system that ensures reliable secure fastening to the saddle rails.The clever roll closure ensures the pack can be effectively used for lighter loads. While compression straps help achieve a streamlined mounting that won't impede your speed. Complete with reflective details so you can be spotted in low light. Waterproof designRoll closureHook & Loop mounting systemElasticated cord systemReflective detailsUp to 17L capacity