Weight Vest-Unisize- 40 Lb. In 1/2 Lb. Increments Unisize * Side and front D rings provide adjustment from small to large * Contour foam fully cushioned fit with protective padding for chest shoulders upper back spine waist and entire inside of vest * Useful to increase proprioceptive input to shoulders and trunk * Anterior and posterior mid and low thoracic individual weight slots * Exclusive design places weights away from the body * Can be used for trunk stabilization in seated position *