I have the Elite walkable soakers, which are pretty similar to the Treks. They are great soakers, but like I previously said, from experience, if you're walking outside a lot, and you need to negotiate uneven ground, rocky dirt, and/or stairs/curbs, they're not as stable as the hard plastic ones you strap on. They move around some inside the soaker. For flat, even surfaces, they work great. I would recommend the plastic ones with the heel strap. When properly fitted, those suckers stay on very well.