> For the complete documentation index, see [llms.txt](https://emotiv.gitbook.io/epoc-flex-user-manual/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://emotiv.gitbook.io/epoc-flex-user-manual/cap/epoc-flex-cap.md).

# EPOC Flex Cap

![EPOC Flex Cap](/files/-LuAVELuc-g0XrDmLqHl)

The standard EPOC Flex cap follows the official 10-20 system and has 72 openings as shown below. The cap has two pockets for securing the controller into the cap, one is fitted below Cz and the other Iz.

![10-20 sensor map](/files/-LIeRuT5e0auIoeSln-G)

The caps can be ordered in standard sizes are 54, 56 and 58 cm in a black high comfort material. Other sizes in 2cm increments, hole positions, materials and cuts are available please contact [online support](https://www.emotiv.com/contact-support/) for further information.