Has anyone ordered either one of these from gwlittle.com I just arrived in Florida today with my babies and it is SO hot! We have a convertible and love to ride with the top down and I am going to order the mat, but was curious if anyone had the vest or something similar and how much they liked them and if they actually lasted a good while. If they work well, I think they'd be perfect for keeping my guys just that much cooler in their carseat with the mat AND the vest. Any feedback would be great!