Ironman® 30-Lap Shock Resistant. Size: Full-Size Strap: Shock Resistant color: Black/Yellow A throwback to the 1986 best selling original, but with improved modern functionality and shock resistant durability, the Timex® Ironman® 30-Lap Collection has given the iconic style new life by meeting the demands of today's athletes Features:. Shock resistant to ISO standards INDIGLO® night-light with NIGHT-MODE® feature 30-lap memory recall 100-hour chronograph with lap or split option in large digits 99-lap counter On-the-fly recall of lap or split Top pusher for easy lap and split option 24-hour countdown timer with: countdown/stop (CS) and countdown/repeat (CR) Daily/weekday/weekend alarm with 5 minute back-up 2 time zones Built-in setting reminders Forward or backward setting Water-resistant 200m.