Features of the Sea to Summit Aeros Premium Lumbar Support Pillow Inflate pillow in just a couple of breaths and fine-tune easily with the multi-functional valve Brushed 50D polyester knit is very soft and comfortable Curved internal baffles create contours that Cradle your head Scalloped bottom edge centers pillow around your shoulders whether you Are sleeping on your back, side or upright in a chair Synthetic fill between contact surface and TPU bladder increases airflow for additional comfort