Once on, the deep pressure vest promotes calm, reduces agitation, and increases focus and concentration. Its comforting embrace gives us the sensation of a big hug. This vest offers proprioceptive stimulation; its firm and soft pressure allows the child to become more aware of his body in space. It is this awareness that causes a sense of calm and regulates the energy level of the child. The vest attaches with Velcro to allow a perfect fit on the body, but also to adapt the pressure to the comfort of the user. Medium size has an adjustable chest circumference up to 92 cm. Length (shoulder to waist) is 51 cm. For ages 10-13 years. Recommended age 10-13 years