M-Express is Myntra's latest express service. It is to allow consumers to get their items in a span of 24 to 48 hours after purchase. The express service currently does not cost extra. It is also only available to 1,300 zip codes and will further be available to more cities in the future.
M-Express is only available on the Myntra app right now but will soon be available on the web version in the following months. Keep updating the app for updates regarding the cost and extra features.