The Brake Strap (shown in blue on the diagram) is designed to help support and balance the breastplate.

Small Pony: Measuring 16mm (5/8") wide, this model is suitable to use with Small Pony Empathy (Pairs) Breastplates.Length: 69cm (27") Pony: Measuring 25mm (1") wide, this model is suitable to use with ZGB, Elite, Classic and Empathy (Pairs) Breastplates.Length: 48cm (19") Cob: Measuring 25mm (1") wide, this model is suitable to use with ZGB, Elite, Classic and Empathy (Pairs) Breastplates.Length: 61cm (24") Full Size: Measuring 25mm (1") wide, this model is suitable to use with ZGB, Elite, Classic and Empathy (Pairs) Breastplates.Length: 66cm (26") Extra Full: Measuring 25mm (1") wide, this model is suitable to use with ZGB, Elite, Classic and Empathy (Pairs) Breastplates.Length: 82cm (32")