The attributes with «Yes/No» as a value of the «Catalog Input Type for Store Owner» option should be allowed as configurable options

dmitry_fedyuk (Dmitrii Fediuk) January 6, 2016, 10:20pm 1

https://community.magento.com/t5/Technical-Issues/Impossible-to-add-a-Yes-No-attribute-to-a-product/m-p/25584

«Yes/No» attributes should be allowed in the Layered Navigation

dmitry_fedyuk (Dmitrii Fediuk) January 6, 2016, 10:27pm 2

See also:

Why does the «Yes/No» attributes are not allowed in the Layered Navigation?