I've tested quite a few of the "thinnest" latex condoms (they're basically all bottomed out at .004 mm), hoping I wouldn't have to resort to these because they're expensive. I finally caved and tried these, and they're worth it. Is it like wearing nothing? No, no condom will ever be like that. But I can safely say these are as close as it gets. By far the thinnest on the market, and the best heat transfer. If you're not sure your size I recommend just getting 2-3 sizes and testing them since they're all constructed a little differently and can run a little snug.