Thank you for letting me know. I appreciate that!!
I find it really -really- comes down to preference. There's been a couple that we've tried that I've absolutely hated because my laptop feels too big for the mat or the mat would slip out from it's tilted position when I'd pick it up to move it and laptop together.
This is the one we currently have: Love it!!
Targus Chill Mat with 4-Port USB 2.0 Hub, Black = $48.25 - Style: 4-Port
https://www.amazon.com/dp/B00DXTJTL6-- Might be able to find it cheaper at BestBuy, if available.
We've tried these and like them:
Targus Portable Lightweight Chill Mat = $32.99
https://www.amazon.com/dp/B002NU5O9CHaven't tried, but would recommend because of the style
TECKNET Laptop Cooling Pad = $24.99
https://www.amazon.com/dp/B014F4SBMKThis is one I don't like, because it would slip out from it's tilted position too easily.
Kootek Laptop Cooling Pad = $19.99
https://www.amazon.com/dp/B01469DJLM