Thanks to the unique combination of 0.38 mm thickly hardened glass and the unique combination of PET foil, the glass is both hard and flexible - up to 180 degrees! Thanks to this elasticity, the edges of the glass are not damaged or cracked, thus extending its lifetime. The glass is thin too - it does not make the phone thicker and fits perfectly with most of the cover. The edges of the glass are rounded to guarantee safe use.