Zynergy seems to be a fairly new New Zealand brand. Looks like the company is about getting children interested in badminton and their main services are coaching and selling shuttles. Z1- goose feather, soft cork, speed 78, tournament use Z2- goose feather, speed 78, tournament use Z3- duck feather, speed 77/78, club and competition Z4- duck feather, speed 77/78, club and social play From what I've seen on Facebook, a few clubs are starting to use it as their main shuttles or as prizes. Keen to hear if anyone has tried it. Packaging is definitely quite nice