In an Ironman-length triathlon, participants swim 2.4 miles, bike 112 miles, then finish by running a full 26.2-mile marathon. It’s certainly not for the faint of heart. Fortunately, shorter races are popular, and racers ranging from children to senior citizens are joining the craze. For most triathlon participants who come from a biking or running background, the swim is the most difficult portion of the race, making swim gear an excellent gift. If you’re shopping for a gift for the triathlete in your family, you won’t go wrong with these three ideas.