I'm sticking with this for dental floss.

It's Dr. Tung's Smart Floss.

When I first started using dental floss, I used Oral-B, which is easily available at the supermarket, but it felt like nylon string or fishing line, so my gums hurt.

I bought this after getting a recommendation, and it feels so refreshing.

It's thin, but should I say it stretches sideways?

It feels like a wide surface rolled up like a thread.

So it spreads widely between the teeth, effectively removing tartar.