In June 2019, Out of the Sandbox announced that its newest Shopify theme, Flex, is currently close to being released.
UPDATE: As of August 7th, 2019, the Flex Shopify theme is now available for purchase!
The Flex theme is $450.
New theme features
As you may know, Shopify announced new theme features at its summer event Unite.
Out of the Sandbox is committed to being compatible will all required Shopify theme features (and any others announced in the future) as soon as possible.
In general, Shopify will issue a deadline by which themes must be compatible with these features and Out of the Sandbox complies with these guidelines.