 Polyisoprene is a synthetic version of natural rubber latex . While significantly more expensive , it has the advantages of latex ( such as being softer and more elastic than polyurethane condoms ) without the protein which is responsible for latex allergies . Like polyurethane condoms , polyisoprene condoms are said to do a better job of transmitting body heat . Unlike polyurethane condoms , they cannot be used with an oil @-@ based lubricant . 
 Polyisoprene <a href='drop_aux' title='1'><mark>is</mark></a>a synthetic version of natural rubber latex . While significantly more expensive , it <a href='got' title='2'><mark>has</mark></a> the advantages of latex ( such as being softer and more elastic than polyurethane condoms ) without the protein which <a href='drop_aux' title='3'><mark>is</mark></a>responsible for latex allergies . Like polyurethane condoms , polyisoprene condoms are said to do a better job of transmitting body heat . Unlike polyurethane <a href='negative_concord' title='4'><mark>condoms</mark></a> , they cannot be used with an oil @-@ based lubricant . 
Polyisoprene a synthetic version of natural rubber latex . While significantly more expensive , it got the advantages of latex ( such as being softer and more elastic than polyurethane condoms ) w/o the protein which responsible fir latex allergies . Like polyurethane condoms , polyisoprene condoms are said to do a better job of transmitting body heat . Unlike polyurethane no condoms , they cannot b used witt an oil @-@ based lubricant .