OTTO X is the midnight black version of OTTO. It is a waterproof figure 8 harness designed for comfort, security and freedom. The figure 8 makes it easy to adjust for a good fit both around the neck and the girth right behind the front legs. It wraps securely around the chest with a cross and pulls the shoulders back when needed. The minimal design is meant to make your pet feel unhindered and free. ESCAPE-PROOF DESIGN The smaller loop of the 8 wraps around the bottom of the neck or the "shoulder" while the larger loop wraps around the chest right after the armpits. This continuous strap design makes it easy to achieve a good fit and prevent escapes. WEIGHTLESS COMFORT + FREEDOM The major difference a figure-8 harness when compared to a H or Y shaped harness is that it does not have a vertical part in front of the chest that can bunch up when your pet runs, plays or make vigorous movements. The minimal straps and parts make it extremely comfortable and do not obstruct the most vigorous movement. WATERPROOF + EASY TO CLEAN Perfect for rainy days or muddy trails, this harness is 100% waterproof and will only need a wipe to keep clean.