We built this in Shopify. We used Launch shopify theme and also applied custom modification as per need of customer.
BetterBack allows you to effortlessly sit in perfect posture, easing backpain and preventing it. Lightweight and portable, it makes every chair ergonomic. Wearing it for just 15 minutes a day can retrain your body’s default posture, so when you stand or sit without BetterBack, your posture is greatly improved.