Size Guidelines 📏

Product Size Measurement (Centimetres)
Foal35cm to 45cm
Adult45cm to 55cm
Adult XL55cm to 65cm


  • A good seal between the Flexineb Mask and the muzzle of the horse is important for correct airflow through the mask.
  • The aerosol mist in the chamber should empty each time your horse inhales.
  • If this is not the case check the exit valve is closed and try adjusting the mask to create a better seal around the horses muzzle.
  • If an Adult or Adult XL Mask does not create a good seal on your horses muzzle you may need our Mask Adaptor Kit to create a better seal.