Our Best Gels are the latest addition to the Catherine gel families. Our Best Gel from Catherine are the best gel we've ever had! Our Best Gel promises extreme durability with absolutely gentle adhesion. It has perfect flow properties and runs smoothly on the surface, so filing is not necessary. Once the file ever need to be used, this is done more easily and quickly than ever. As a result, a lot of time is saved in everyday studio work. No more heat development during curing! Absolutely sustainable! You only buy the empty outer packaging once, i.e. the gel jar, which is filled with the replaceable refill inserts. You benefit from price savings and at the same time do something good for the environment. Once you have a jar, all you have to do is buy new refill inserts.