- Materials. Neoprene, and similar materials, exert a much lower “drag” in the water. The swimmer glides much better, almost as though the water were a native environment.

- Thickness. Triathlon wetsuits, at least at the high end, are not a uniform thickness. The torso part of the suit should be thicker to help the swimmer float higher in the water, and the arms and shoulders should be thinner, and therefore more flexible, to help the swimmer move faster.

- Construction. Unlike a regular swimsuit, a triathlon suit doesn’t allow any water inside. A loose neck opening, or floppy wrist opening, would act as water scoops were it not for tight seals. A competitive athlete doesn’t want the weight or the drag.

How these things are executed vary from brand to brand, but those are the basic features that separate the sharks from the fish.

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As with most specialty sporting items, there is practically no upper limit on what one can spend on a biking jersey. That being said, a well-fitting, reasonably priced jersey can be had for less than $100. There are plenty of good deals to be had online – www.bikejerseys.com is a good place to start – but nothing beats shopping at an old-fashioned brick and mortar shop when it comes to getting a jersey that fits right.

Finding a reputable store with good prices can be tricky, so the best place to start is to ask around with members of your local bike club (most cities will have one). Once you’re at the store, don’t be afraid to try on a jersey before you plunk down that hard-earned cash.

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