I recommend Systema sponge dental floss.

I had been using dental floss for a long time, but since I was buying it through direct import, it was a bit of a financial burden, so I tried switching to this floss. The amazing thing about this floss is that it doesn't hurt. If most of the floss we commonly use feels like scraping with thin nylon thread, this feels like wiping with a soft cloth.

When it comes into contact with moisture in the oral cavity, the string swells up like cloth; because the contact surface area is large, it causes minimal pain. Since it causes little pain, you can wipe it away more freely.

Therefore, when trying to clean the narrowest part at the very back of the molars with conventional dental floss, it was common to give up because it was painful or difficult to control the force. However, since this product has a wider surface area, there is minimal pain and the force can be controlled well, allowing you to clean it vigorously.