Try on the TREKKER at your local The EyeDoctors Optometrists location. These black designer sunglasses from Denali are perfect for enjoying time outdoors and catching some sun. Made from plastic, these sunglasses feature a design and can help you see clearly with prescription lenses. At The EyeDoctors Optometrists, we can build a complete pair of Denali TREKKER just for you, with custom lenses designed for your vision needs.