The Back Sac lumbar support cushion is designed to fill the gap between your low back and a chair, or surface you are sitting on
The Back Sac uses an air bladder that intentionally contains a larger potential volume than the area it needs to support.
When you place the BackSac in the curve of your low back or neck and sit or lie against it, it will become instantly pressurized, with the air that is inside flowing into your spinal curve.

Technical Details

Product Details

Package Dimensions
Width : 6.1 inch
Height : 2.9 inch
Length : 8.6 inch

Shipping Weight: 5.6 ounce (View shipping rates and policies)

ASIN : B005JCS4TS