Fi Compatible 3/3+ 1" Width BioThane® Martingale Collar Collar Size:16-18" This is the style that

This is the style that comes with your standard fi collar and is the recommended fi style for the new series 3+ to ensure you get the most optimal accuracy with its additional behavior monitoring features

dog sports & much more

These Fi 3/3+ compatible collars are made in either the "overlay" fi style or "in-line" fi style

These long lines have the option to add a handle at the top of the leash or not

Fi Compatible 3/3+ 1" Width BioThane® Martingale Collar Collar Size:16-18" This is the style thatTake your dog on any adventure with confidence, thanks to BioThane the 100% waterproof, dirt proof, and adventure proof material. Whether your dog loves to swim, hike, surf, or play in the mud, our BioThane gear is designed to keep up with your dog's active lifestyle. With a range of colors to choose from, you can find the perfect collar to match your dog's personality. Martingale collars are specifically designed to provide more control than a