Dog Walk | 4x4NorthAmerica Compact, Super Lightweight, Expandable Aluminum Dog Ramp. Give your dog a leg (or four) up with our high-quality expandable Dog Walk. This lightweight three-section telescoping ramp features a non-slip “Super Grip” surface. The Super Grip tread is skid-resistant even in wet weather. This unit makes entering and exiting any vehicle a snap for dogs of all sizes and, when not in use, allows for safe compact storage.