The E-Z-On Adjustable Vest is a transportation safety vest that is dynamically tested to position special needs children and adults in a car, van or bus (with the appropriate seat mount.) Each vest is sized for growth with three back zipper positions on each size. The Tether Mount uses two tether hooks at the top and requires the use of a lap belt to go through two loops on the vest at the waist area. The Floor Mount uses 4 tether hooks and does not require the use of a lap belt. The Tether Vest is designed to be used by individuals who need some upper body trunk support. The Floor Mount is used as a safety measure to make sure than an individual stays safely seated at all times. The individual should not be able to get themselves out of the vest when it is attached to the Floor Mount.