Thule Arcos Box. Thule Arcos gives you plenty of loading space at the rear of your car, keeping the roof free to reduce wind resistance or to carry other loads. The design of Thule Arcos is modern and streamlined, with an aerodynamic wing shape that makes it feel like a natural extension of the vehicle. Premium cargo box, giving the car up to 300 L of easily accessed, extra loading space|Aerodynamic design for little impact on fuel consumption or on the range of your electric car|One person attachment of the carbo box|SlideLock system with separate locking and opening functions that automatically locks the lid in place and shows when the box is closed securely|Box sits low to the ground, making it ergonomic and easy to load and unload cargo|Easy access thanks to low profile of the box|The individual parts of the box can be separated for compact storage or for one person attachment