Introducing the HTC One GLAS.tR Slim! At .4mm the GLAS.tR Slim is the thinnest rounded glass screen protector available for the HTC One. Rated a hardness level of 8H-9H the protection provided by the 100% real tempered glass is unmatched. While the GLAS.tR Slim is 28% lighter, the clarity still remains stunning. With the reduced weight and rounded edges, the GLAS.tR Slim provides the best bare phone experience.