Both symbols do tell you that a tire is winter-ready, but they don't exactly mean the same thing. M+S, which can also show up as M&S, M/S, MS, or M-S, means Mud and Snow. Unlike your regular tires ...

The wiring diagram and its data, freely available through the MICrONS ... HD video), and offer never-before-seen insight into brain function and organization of the visual system.