My partner is allergic to latex and Skyn produce the only non-latex condoms on the market. For me, they are smooth and feel great. They are more comfortable than latex and arguably feel even better than without a condom. However, for my partner, they feel fine for about 10-15 minutes before they start to produce a vacuum and squeeze down hard, causing him pain and obviously ruining the moment. We are not sure if this is a sizing issue or something else. There aren't any further size options or otherwise for us to try so we are limited to very uncomfortable safe sex for him, or using the withdrawal method instead which has its own problems.