The hydrogel film a kind of soft screen protector, made of special PC+TPU+Plastic material. Compared with tempered glass, the most specialty is never be broken. It’s praised as can be used until you change phone. With the function of slight anti-scratching and with a certain degree of hardness, the hydrogel film is getting more and more popular in the market with its high transparency and its original clearness.
Nevertheless as with all screen protectors, you only have 1 chance to install properly otherwise you will notice bubbles and small particles like hair, dust... etc so make sure to install it properly the first time.