I didn't realize it, until I mistakenly ordered the wrong ones, but there are two different kinds of Trizact belts. The Trizact "gator" style belts are the ones I have been using for a few years and I love them for the finish they provide. These are the thick belts with no visible splice, which have the engineered abrasive texture that looks like little raised squares all over the belt. The pros/cons of these belts are that they provide a wonderful finish. The negative is that they cut extremely slowly.
However, there is another Trizact belt that is very thin and looks like a woven fiberglass. When I got them I was upset at myself for not paying attention during my order. I was afraid to use them because they are very thin and I thought would give me the same splice bump as the other thin belts. However, these belts do not have the splice problem and they cut like nobody's business. I was shocked at how fast they cut and the finish they create is pretty impressive. These are now the belts I go to first to remove 120 grit scratches. But I also go to the Trizact gator style belt after using these to get the satin finish before I start hand sanding. The obvious question is why do 220 twice- and the reason is the thin belt works fast but leaves its own scratches. Using the 220 gator belt for a few passes gives me a quick jumpstart when I begin hand sanding at 320.