CRYSTAL Silicone is an exclusive CRESSI material that revolutionizes mask skirt clarity.
It offers incredibly clear vision and features long-lasting advanced technology components within the pure silicone skirt which prevents premature discoloration, reduces fogging, and guarantees many years of CRYSTAL clear viewing. 
CRESSI CRYSTAL silicone : Another Exclusive Industry First

• Stainless steel case, crystal glass face and waterproof crown combine to withstand pressures to 10 ATM (332 feet). 
• Proven Quartz mechanism for precision timekeeping.
• Unidirectional bezel clearly marked for tracking dive time.
• Fluorescent hour/minute/second hands are easy to read in low-light conditions
• Extra-large rubber strap accommodates exposure suits