Experienced and competitive swimmers more than likely have the suit, goggles and swim cap they want, but beginners or casual swimmers may not. For a swimmer who is still doing laps in beach trunks, a pro-quality suit or a pair of jammers (they look like bicycle shorts) can make them sleeker and faster in the water. Swim caps will, too, and goggles will protect the eyes from chlorine irritation.
Skin and Hair Treatment
Chlorine dries the skin and hair, and though its smell is not unpleasant, it is strong. Buy your swimmer a moisturizing body wash, a clarifying shampoo, a conditioner and a lotion. Then put everything in a compact toiletry kit that will fit inside his gym bag.
Waterproof MP3 Player
Music motivates a workout and helps ease the monotony of doing lap after lap. Find out what kind of MP3 player your swimmer owns and buy a matching waterproof case and headphones. Try to find products made by the MP3 player's manufacturer, as using an off-brand casing or headphones may invalidate the warranty in case of damage.
Other Exercise Gear
Swimmers do much of their training in the pool, but many condition their bodies in other ways as well. A good pair of cross-trainers will help them diversify their workout, and a set of dumbbells makes it possible to do some strength training on those days when they can't make it to the pool.
Advanced Swim Accessories
Serious swimmers always are looking to get stronger and faster, and specialized swim equipment can help. Kickboards keep the upper body afloat and allow swimmers to build their leg strength. Pull floats do the opposite; they take the legs out of the equation and cause the swimmer to use the upper body. Pull buoys cause drag, forcing the swimmer to build muscle by working harder.