Virtually all condoms are thinner than a human hair, most by a factor of 2. Human hairs aren't really that thin.
The nice thing about polyurethane condoms is that you can use them with oil-based lubes, which retain their slipperiness much better than water-based lubes. A word of caution: because polyurethane is not elastic, these condoms are more likely to break than latex.
“As I am sure any cat owner will be able to tell you,
someone else putting you in a box is entirely different
from getting into a box yourself.” —bisexualbaker