The Lifetime 90508 is one of our most popular kayaks, the Lifetime Kayaks are extremely stable and you can definitely stand up in the kayak, but it isn't comfortable or convenient to do that for long periods of time. In other words, there's no flat surface to find a comfortable standing position. You can stand up, but most people stand up just to stretch out their back for a moment or two. Make sure to exercise caution when standing on a kayak. Feel free to contact us with any other questions.