These boots have heat resistant, moisture absorbing, and non skid fabric to protect your pets feet from hot surfaces
My proper fitting and care of boots video https://studio.youtube.com/video/E849...
InsulBrite http://amzn.to/1Ag0jHY
One Wrap Velcro http://textol1px.rtrk.com/textol.asp
Toughtek https://www.etsy.com/listing/26381956...

For the Thin ZORB fabric just check your local fabric stores or order on Amazon, sorry I didn’t find a link

My other step by step DIY boot videos Step by step how to make video    • How to make the best dog boots ever  
   • Dog Boots, How to make, Best ever  

This is a list of the sizes to cut the fabric to make the boots per weight
If I can not see your dog in person to do a fitting, this is a rough guess.
Happy sewing
2 x 3 under 8 lbs
2.5 x 3.5 812 lbs
2.5 x 4 1220 lbs
3 x 5 2045 lbs
3.5 x 5.5 4560 lbs
5 x 7 60+lbs