Primos Moose Horn Call Quality materials used for all Primos products 100% designed and tested for the toughest situations and environments Whether you are a professional, recreational user, or even casual, Primos will fit the mold for all types of people Open-reed style is 100% FREEZEPROOF Unique -Inchhose in horn-Inch design automatically reproduces the deep guttural moans of rutting cows in Estrus Includes instructional CD explaining how to reproduce Estrus moans and how to use your voice to imitate the grunts of bulls