Uncurl Back Stretcher

A curved board you lie back on after a day in a chair. Three heights: 2.76, 3.55 or 4.34 in (7, 9 or 11 cm), so you can start gentle and go deeper later. Black frame with a blue strip down the middle and small massage nodes Click the arch into one of three slots to change the height No batteries, no app, nothing to charge About 15 x 10 in (38 x 25 cm), plastic, ships flat Free tracked shipping to the US. Not a medical device. If you have a back condition or a recent injury, had spine surgery or are pregnant, ask your doctor before using it.