CAUTION: do not use oil-based lubricants, such as petroleum jelly, vegetable/mineral oils or cold cream, as these may damage the latex condom. Avoid excess heat, store at room temperature. These packages are tamper evident. If package is damaged, do not use. This product contains natural rubber latex which may cause allergic reactions. If you are allergic to natural rubber latex products, consult your physician for advice before use. You may use Durex Avanti(R) non-latex condoms.