Anyball Hybrid 3 in 1 Natural Feather and modified Nylon Badminton Shuttlecocks. Using Advanced technology, 3 in 1 shuttlecock is made of cork, modified stand and the natual feather. Good elastic and durability – A combination of natural feathers, a nylon cage with a composite cork makes the shuttlecock that flies like a feather one with durability closer to a nylon one. Eco Friendly – Instead of using traditional glue and string our hybrid shuttlecocks use a modified nylon material instead of string and 90% less glue for a greener environment. Repairable – As long as the cork and cage are in good condition, you can salvage/recondition the used shuttles by taking out the good feathers to replace the broken ones. High Quality acquired using Automatic production Good Stability – Designed on computer Angle and space between feather spine is the same Anyball 111 Product Details: Material: EVA Cork + Modified Nylon + Natural Feather Feather Material: Class B Goose Feather Colour: Natural White Feature: Durable, Stability