EBISU DAILY Floss for Beginners (Ultra Thin Y-Shape Smooth 30pcs / Ultra Thin Smooth 50pcs) ■Ultra Thin Y-Shaped Smooth Floss 30 pcs. Ultra-thin Y-shaped smooth floss that easily slips between narrow teeth. The floss material is made of PTFE, which is about 0.1mm thin and hard to break. The tape-like ultra-thin floss allows for smooth entry even in narrow interdental spaces. Y-type floss is ideal for hard-to-reach interdental spaces between back teeth. Recommended for beginners who have never used floss before. Comes with a convenient carrying zipper. ■Ultra Thin Smooth 50 pcs. Thinness of about 0.1mm! Ultra-thin tape allows smooth entry even in narrow interdental spaces. The floss portion is made of thin, tear-resistant PTFE material. Recommended for floss beginners. Wide handle makes it easy to hold firmly. Comes with a convenient carrying zipper.