Whether 2017 condoms can still be used in 2020, usually can not be generalized, need to be based on the shelf life of the condom, whether the packaging and condoms are broken, whether the condom properties have changed to decide.1, can be used: it is recommended to check the date of manufacture of the condom and the expiration date, if in the validity of the period, and the outer packaging and condoms are not broken, condoms do not have a change in properties If the condom is within the expiration date, and the packaging and condoms are not damaged, and the condom properties have not changed, the condom can usually continue to be used; 2. Cannot be used: If the expiration date of the product has passed, or the condom’s packaging is damaged and there is a leakage, it can not continue to be used. In addition, if the condom is stored in the high temperature and sunshine environment for a long time, it may make the shape of the condom change, and the brittleness may increase, then it is not recommended to use it again, and it may not be able to play the role of contraception. In the course of sexual intercourse, it is necessary to use condoms correctly and throughout the entire process in order to play an effective role in contraception and prevention of sexually transmitted diseases. Therefore, it is recommended that you try not to use expired or broken condoms, and try to use condoms that are within the expiration date and well preserved.