I have a UK Kevlar with Carbon Tapes main that went on the boat in June of 2004. It has been raced hard and has been badly flogged during some pretty ugly storms. It still has great shape. After every race the sail comes off the boat, is rolled and stored below. I could probably get one more year out of it but will replace it for next season. There are more durable, high tech sails than my tape drive (Quantum's Fusion X for example would probalby be a bit more durable and less expensive)