Pretty much every kayak lists a weight capacity. A common misunderstanding is the number and what it means. If a kayak lists a weight capacity at 350 pounds, that doesn’t mean a 350 pound person can paddle it. The weight capacity indicates the amount of weight a kayak can hold and still float. For a sit on top, that means it would be just at the water line so most of the kayak would be under the water. There is just no way you could paddle that. So if the weight capacity says 350, what is the paddler size that could paddle that kayak?