Strongest material on the market to prevent fraying seams or Hook and Loop that slips. 1-year guarantee. 2 removable patches plus sturdy handle mean you need only 1 vest for work, play, & every day. Select sizes accommodate clip-on backpacks (sold separately) - an exclusive Industrial Puppy feature. Meets travel requirements. Identifying your support dog makes travel easier for both of you. Comfortable padded mesh offers a perfect fit when you measure your dog's chest at its widest point.