Altura\'s largest seatpack is fully waterproof and with a capacity of up to 17 litres is perfect for bike packing and multi-day adventures.Helping you stay aero and efficient on your next bike packing trip. The outstanding Altura Vortex seat pack holds all your 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.KEY FEATURESWaterproof designRoll closureHook & Loop mounting systemElasticated cord systemReflective detailsUp to 17L capacity