Since 1945, the Order of the Arrow has encouraged the use of a Lodge Flap to show membership in the local OA Lodge. Illinek Lodge has gone through numerous different Standard Lodge Flaps, the likes of which can be found below. We are currently holding a competition to redesign the Standard Lodge Flap, and designs can be sent to

Every design must meet the following criteria:

- Either the letters "WWW" or the OA Arrowhead must be on the patch.
- "Illinek" must be written on the patch.
- "132" must be on the patch.
- The BSA Fleur de Lis or the letters "BSA" must be present on the patch.
- It is not required, but the inclusion of the Lodge Bustle or a Cardnial is encouraged.