There are a lot of excellent endurance athletes out there who avoid Ironman triathlons only because they believe there's no way they can swim long distances.
If you are one of those unfortunate folks, check out this video because this new innovation might just be the secret you've been waiting for all these years.
Seriously, this reminds me that it's been way too long since my last swim. I better visit the local pool as soon as possible. Swimming is great for recovery from running.