This zipper uses ladder type symmetrical coil. This uses 4 needles and 4 looper for sewing and hence this is the strongest of all the zips. Being symmetrical in nature, it can absorb wider tolerances in the slider and hence it makes the zipper performance highly reliable. The polyester coil and polyester tape becomes compatible to the fabric in which it is sewn and hence easily washable and dry-cleaned. The
colour fastness in the zippers are better than 4 and they are free from Nickel and Azo.