The Sonic Box combines efficiency with style. It designed for those looking for an aerodynamic box with a wide variety of size and convenience options.This product will be shipped directly from Thule and will leave their warehouse in 2 3 business days. Eligible for UPS ground shipping only. . Patented AeroNose Design reduces drag and noise making it the most aerodynamic box available. Patented Rear Angled Base and expanded vehicle mounting points help maximize trunk and hatch clearance. AcuTight Mounting clicks when you reach optimal hold to ensure your box is secured to the rack. SecureLock ensures that all gear is locked and box is properly closed prior to driving. Dual Side opening for easier loading and unloading from either side of the vehicle. Fits Thule rack systems, round bars and most factory racks. 2 One Key Locks included secure box contents and lock the box to the carrier.