Internal condoms or condoms is an insertable condom which is soft and loose fitted tube with two rings on either end. The closed ring is inserted inside the vagina or anus. The open end of the ring remains outside to keep the condom in place and to remove the condom when done. This creates a barrier and prevents pregnancy and STI. Note: Internal condoms should not be reused.
Sources:
https://www.nhs.uk/conditions/contraception/female-condoms/
https://www.webmd.com/sex/birth-control/what-are-female-condoms
https://www.cdc.gov/condomeffectiveness/internal-condom-use.html
https://www.mayoclinic.org/tests-procedures/female-condom/about/pac-20394129