From Coats & Clark
This pre-shrunk, split-resistant coil zipper has a flat covered back so that it is smooth against the skin. The covered back so that the zipper is smooth against the polyester tape so that it is split resistant, and the zipper does not need to be preshrunk!
From By Annie
These hard-to-find #4.5 nylon-coil handbag zippers are perfect for purses, bages, totes, and carries. Here's why people perfer them: The wide zipper tape makes insertion easy. Unlike zippers with chuncky, molded polyester or metal teeth, these handbag zippers are soft & flexible.