Prophylactics made of plastic. i.e. Condoms made from latex rubber or long-chain polymers. Not sheepskin[0] or other natural materials. [0] Condoms made from

Prophylactics made of plastic. i.e. Condoms made from latex rubber or long-chain polymers. Not sheepskin[0] or other natural materials. [0] Condoms made from sheepskin (really, sheep intestine) help prevent pregnancy but absolutely do not protect either party from STD transmission.