Targeted Back Support: Cylindrical memory foam pillow provides firm support to the lower back, waist, or hips Air-Cloud Comfort: High-density memory foam conforms to your shape while relieving pressure on the spine Adjustable & Secure Fit: 1.25" elastic strap keeps the cushion in place on most office chairs or car seats Breathable & Washable: Mesh cover promotes airflow and removes easily for cleaning Portable & Lightweight: Compact size measures 11.25" x 4.5" x 4.5", perfect for work, home, or travel