An internal condom is a polyurethane sheath with a ring on each end that lines the vagina or anus. The internal ring is inserted into the vagina and lays against the cervix. The outer ring rests on the labia and should be held in place when inserted the penis or sex toy. When using an internal condom in the anus, the internal ring can be removed and put around the outside of the condom to act as a stopper. 

An internal condom can be inserted up to 8 hours before sex, in safe to use with water-based, oil-based, and silicon-based lubricant, and is latex free!