Leash and Collar in One - Simplicity at its best Mendota’s flagship product, used for many years by trainers, is now adapted for exercise, training, and field use. Having the leash and collar in one design allows for correction and ease of use. The adjustable leather slide prevents the lead from slipping off, yet allows it to be released in the relaxed position. 3/8” rope are designed for Dogs under 15 Kg. Items made out of the 1/2" rope are designed for dogs over 15 Kg.