Size: 5” x 10” x 24’’ (13 cm x 25 cm x 61 cm) The ultimate Restorative Yoga Bolster comes with a flat surface which makes it very stable This Yoga bolster's flat surface allows it to fit perfectly under your knees giving you optimal lower back support & deep stretch If you prefer to lie down flat during your meditation session, it will give you back support due to its flat surface Its flat surface allows for a deeper forward bend or a more gentle chest opening than the Cylindrical Yoga Bolster 100% cotton twill cover of the bolster for breathability and absorbency The Rectangular Yoga Bolster comes with a flat surface that makes it stable, fits perfectly under knees to give optimal lower back support, and allows for a deeper forward bend or a more gentle chest opening than the cylindrical Yoga Bolster. Its 100% cotton twill cover gives breathability and absorbency. Key Features Stability: The flat surface of the bolster makes it very stable Lower back support: It fits perfectly under your knees giving you optimal lower back support & deep stretch. If you lay back during your meditation session, it gives you back support Forward bend: Its flat surface allows for a deeper forward bend or a more gentle chest opening than the Cylindrical Yoga Bolster 100% cotton cover: Cotton offers decent breathability and absorbency. It is completely free of allergens, synthetics, and chemicals and they are easy to care for. Yoga/Meditation Style Restorative Yoga & Kundalini Yoga Meditation uses Bolsters and flat Props to give support while lying down on the back