Reduce pain and improve posture with this back cushion Published: Tags: The MODVEL Lower Back Cushion provides lumbar support so you can sit more comfortably and encourage a healthier posture. (StackCommerce) We hope you enjoy Deals4Jax, brought to you in connection with StackCommerce. WJXT/WCWJ receives an affiliate commission if you buy through our links. Check your posture. As you read this, are you slouched over your phone or computer, or sitting comfortably and upright? Days are long and balancing both comfort and proper posture can feel like an uphill battle. Fortunately, there are small changes you can make to significantly improve the position of your back and your entire body. The MODVEL Lower Back Cushion provides lumbar support so you can sit more comfortably and encourage a healthier posture.