This is a tire used for urban/commuter riding. These types of tires are designed with foremost with durability in mind. They need to last a long time, surviving daily riding under tough conditions, and so they incorporate special features like kevlar lining to help resist cuts and punctures that can cause flat tires.
Notice how this tire has more tread than a tire for a racing bike to help provide better traction and grip to sometimes wet paved surfaces, yet not so much that it'll slow you excessively as if you were riding a bike with the big old knobby mountain bike tires.
These tires will also sometimes feature reflective sidewalls, to increase rider visibility to others.
