Continental Grand Prix 4 Season Road Tire Ultra-fine polyamide casing provides supple, all-day performance DuraSkin sidewall reinforcement supplies excellent protection against cuts and abrasions Optimized tread compound gives you exceptional grip in wet weather, rides smooth in low temperatures and guarantees long lasting performance 5-ply polyamide casing has been woven with super-fine threads to lighten this tire for faster acceleration and a smoother ride Double Vectran Breaker belt directly underneath the tread offers the highest level of protection against scrapes and punctures