Many well-known equestrian outfitters now offer fly bonnets with noise protection. This feature is generally indicated by a name suffix such as "soundless" or "silent". Otherwise, it is clearly indicated in the product description.
These types with noise protection are are usually ear bonnets. The fly hoods often consist of three layers. Cotton is used all over the inside and outside, with the sound-absorbing material in between. It should be soft and adapt to the shape of your horse's ears. After all, the fly bonnet with noise protection must be perceived as comfortable by your animal in order to fulfil its purpose. Such a fly bonnet should not only protect your horse's ears from insects, but also provide more concentration by suppressing environmental noises.