This is the Continental Gator Hardshell Road Tire. The added protection in the hardshell version of the already tough gator tire means you have additional security against punctures from debris or wear.  If the roads are a little rough or dirty where you ride, these will help you keep it rolling. 
Features: 

• Duraskin sidewall protection, in addition to Hardshell features, provides a durable, high-performance tire suited to athletic urban riding styles
• Hardshell protection consists of casing-ply overlap covering more of the sidewall than normal, plus an extra-wide PolyX breaker
• High-mileage, carbon-black tread compound