If you’re looking for your premium rewards card to have a matching premium feel, then you’re in luck — the Delta SkyMiles Reserve is a metal credit card. In fact, you can choose between a metal design or an eco-friendly card option made from 70 percent reclaimed plastic. However, whether a card is metal doesn’t affect the value of its features. A sleek metallic design is nice, but you should base your decision on selecting the best card for your spending habits.