100 M water resistance A highly reliable & accurate metal movement Shock detection protection, A dust-proof covered movement coil Non-breakable date construction Featuring military specialized nylon webbing with heavy-duty stitching. Swiss Super Luminous material that will intensely glow for hours based on exposure to sunlight or indoor lighting Luminous material will not wear down battery life Specs Solid stainless steel buckle and dual loop keepers Case: 40mm Weight (46g / 1.6oz) Band size: 7/8" 22mm 3 year battery