All Lupine products are proudly built in Conway, New Hampshire and GUARANTEED (Even if Chewed). 1” wide Combo collars are suitable for medium and larger dogs. A limited-slip martingale-style collar for walking and training. It should not be left on an unattended or unleashed dog. Features strong bar-tack stitching and welded D-rings. Slips on over the head. To determine collar size, measure around the middle of the dog's neck, AND around the widest aspect of the head. Allow an extra 5% to the longer measurement for a comfortable fit. Lupine products are not recommended for tie-out. Machine wash, warm water, mild soap (no bleach or bleach alternative). Air dry.