Adjustable Martingale Leather Dog Collar - Custom SizedOur custom leather martingale collar combines a premium martingale chain with a solid brass buckle and loop to keep the strap sitting neatly in place. You can choose up to two of our full grain leather colours for a personalised look that suits your dogs personality. Every martingale collar is crafted in our NZ workshop, where we focus on quality, comfort, and style. Premium Leather: We use premium full grain leather the highest grade of real leather,