The Estrella is a single glass mask, designed for adult faces ideal for doing snorkeling. The quality of the assembly and of the materials is the same as the most technical Cressi's range masks: unbreakable tempered glass, polycarbonate frame of reduced thickness and weight, simple and resistant buckles integrated into the frame and in the front-side, silicone strap. Its design is studied to obtain a very wide vision in all directions, so you will not perceive any claustrophobic effect. The facial skirt is made of hypoallergenic silicone. The silicone is a great material, better than traditional PVC or TPR, due to its softness it adapts to most facial shapes ensuring comfort and a perfect seal. The buckles can swivel in all directions thanks to the flexible connection to the facial skirt. Thanks to the push-button design, with one hand it is possible to do micro-adjustment of the strap length. The connection with the facial skirt is completely flexible and this design reduces drastically the breakage and it increases the comfort.