How To Repair Cuckoo Clock Bellows?

How To Repair Cuckoo Clock Bellows? 12′′ x 12′′ bellows material (Tyvek). Used for recovering bellows. Description: 12′′ x 12′′ bellows material (Tyvek). What material is used for cuckoo clock bellows? 12′′ x 12′′ bellows material (Tyvek). Used for recovering bellows. Description: 12′′ x 12′′ bellows material (Tyvek). How do you restore the cuckoo clock