The Mesh Rug Hood consists of the same fabric as the Mesh Rug and is fastened with a carabiner hook around the halter and three carabiner hooks on the rug. Loose separate metal rings which need to be sewn on to the rug are included. The Neck hood is fastened under the neck with three velcro straps. https://botcanada.com/ sizing charts can be found https://botcanada.com/sizing-charts/