Durex Quality Assured 100% of condoms are electronically tested. Five more quality tests are carried out on every batch. On top of that, this condom has been dermatologically tested too. Find Your Best Fit Everyone is different, but the right fit should always be comfortable and secure. Straight-walled. Teat-ended, smooth shape Girth - Close Fit (Nominal width 52mm) Lube - Regular silicone lube Thickness - Ultra thin Latex - Transparent natural rubber latex condoms. Smells Better - The way we make Durex condoms makes them smell better. Durex Invisible Close Fit condoms are ultra thin, designed to maximise sensitivity while still providing a high level of security and protection. For the comfort of those who prefer a size narrower than our regular Invisible condom.