This lightweight version of the popular Sitback Rest promotes proper posture in any chair while providing support and comfort for your lower back. The mesh material maintains airflow to the back, keeping you cool and comfortable all day. Side-support wings ensure ultimate comfort by helping keep you in the correct position. Use at home, office or in your car. Elastic strap fits almost any chair. Black. 17.5"W x 14"H x 5.5"D (45 x 36 x 10cm). Latex free.