Do you refer to the Flex team made by the Out Of The Sandbox team? If yes, this theme is not listed on their page within Shopify Themes Store at this time. However, you should be able to find it on their website.
If you’d like to use a theme that is installed directly from our Theme Store, let me know what features you’d like your theme to have, and I’ll help you find the best next option. Keep in mind all available themes on the Shopify Theme Store are optimized for performance and usability and come mobile-ready for customers on the go.
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