Basic Collars by Carhartt. Details:Make no bones about it, our ultra-durable collars are up for whatever task comes your dog’s way. Built with duck canvas materials, this collar has a classic look that’s undeniably Carhartt. It has reflective details to stand out at night, it’s fully adjustable, and it’s built with a sturdy half-metal, half-plastic buckle that stays strong but is still easy to take on and off.