RideTecs 16" Engineer Zipper Biker Boots Built with rugged biker styling, this 16-inch engineer boot combines heavy-duty construction with dependable everyday durability. The full-grain stonewashed oil leather upper features a zipper closure for easier entry, plus an adjustable collar and side ankle straps for a customizable fit. Goodyear welt construction reinforces the boot for lasting wear, while the standard footbed and plain soft toe provide straightforward comfort. An oil-resistant outsole and approximately 1.5-inch heel create a sturdy, stable foundation.