I used the Old Town Vapor 10 on a lake in the Black Hills of South Dakota this summer. It is a single layer polyethylene kayak. It performed well in the water. It was relatively stable & tracked very well considering it was a very windy day. The only disappointment was the seat back adjustment system. It was hard to adjust & the rope that held the back broke because the system that secured the rope caused it to be frayed & eventually break. Overall a light, good performing kayak with need for an improved back adjustment/secure system.