Abdominal harness belt type that is made of a semi-rigid material breathable three-layer polyamide, foam and polyester, which incorporates a regulation and fastening straps with closing buckles identified by a color code for easy placement. It is specially designed for people with problems of fastening to the chair, as it helps to hold the patient to the wheelchair or any type of chair, allowing full freedom of movement of the cervical-dorsal area. Size 0 is equivalent to a total contour of the person with the chair of 35-190cm.