Sports Performance The thinnest (8 mm), fully featured 100 meter/10 ATM watch ever, designed to never be in your way Time, Date & Chrono Day, date, chrono and countdown timer with lockout feature to ensure countdown is never disturbed Small and Sturdy 38 mm case made of PMMA, a modified thermoplastic material, to resist scratches and withstand impact Bright Ultra thin electroluminescent backlight with 100 meter/10 ATM water resistance Comfort Supple, custom-molded Silicone band and patented lock