There are some materials that are needed to repair Crocs. However, it all depends on how damaged your Crocs are. For example, if you lost rivets, you will require the following stuff
Snappy Replacement Heel Straps Black for Clog Shoes 9.5 inches long
4 x Snaps for Crocs Shoe Repair Rivet Button to fix Broken Heel Strap FREE SHIP
Brands
How to Replace a Croc Anke Strap Rivet - iFixit Repair Guide
Accessories for Bags
VMAXTANKS Croc Replacement Rivets, 10pcs Clog Garden Shoe Repair Rivets Compatible for Crocs-Styled Shoes Strap Button Replacement, One Size, Black
How To Clean Crocs in Simple Steps?
My strap for my crocs broke. Is there any way to fix it? I don't plan to use it around my heel : r/fixit
4-Pack Replacement Repair Parts for Crocs Shoes Straps – ClogsDoc USA
How to Replace a Croc Anke Strap Rivet - iFixit Repair Guide
How to Clean Crocs with Fur? Simple Solution.