Timbuk2 Especial Dos Backpack (Small) Fabric Backbender flexible cooling panel for superior ventilation and comfort. Air jet textured for high abrasion resistance and exceptional strength to weight ratio. Comfort backpack straps with hydration or headphone routing, a reflective hit and detachable sternum strap. Internal pocket for laptops up to 13" inches or can accommodate a hydration bladder. Compact profile designed to carry the essentials.