Equiline Ruben Soundproof Tie Down Ear BonnetWe love this bonnet not only for the soundproof design in the ears to help spooky horses, but also the tie down design that keeps it firmly in place while on course. Soundproof tie down ear bonnet that allows the horse to remain concentrated while avoiding any distraction from environmental noises. The soundproof system SLE comprises of 3 layers: allergy free cotton with a special antibacterial treatment make up the lower and upper layer, while