Available in black or dark brown, beta reins are made of the same material as the beta bridles, Genuine BioThane USA. They are soft and strong and look like leather. They are a split rein with the option to tie them together with a small rawhide string. The reins buckle onto the bridle at rings at the ends of the crossunder straps. Beta reins are 1.6 cm wide and 137 cm long.