Forget Captain Kirk and his tight blue space suits. Today's high-tech clothes fit unobtrusively in your existing wardrobe.

In the past, functional clothing was poorly designed, to the point where no one wanted to wear it, says Agathe Planchon, designer and creator of Gustto handbags, a line of totes boasting compartments for a phone, iPod and Blackberry or Treo. "Now," she says, "designers are catching on and understanding how to incorporate their ideas into wearable pieces of clothing."

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Smart clothes for men and women come in all forms, from jeans equipped with an iPod docking station to sweaters that regulate body temperature. And with sales of performance-based clothing increasing by 25.3% in 2006, according to NPD a retail research firm based in New York, you'll be seeing more and more of them in the future. Functional womenswear was not tracked.

"People have changing lifestyles," says Maggie Mahler, spokesperson for Nike, which offers a line of sneakers that links mileage data to a user's iPod. "They are getting busier, and clothes are evolving to accommodate that, whether it is a jacket that holds an iPod or a running shoe that tracks how far you have run."

Functional Fashion
Robert Crivello and Savania Davies-Keiller, designers for DDC LAB, a clothing company that incorporates technologically advanced fabrics into their designs, have come up with a radiation-repellent material for sport coats and suits. They say it protects the wearer from the sun's UV rays and radiation emitted by cellphones, although it has yet to be proved that wireless radiation causes harm.

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"I've always been fascinated with technology, so having the opportunity to experiment with different materials with my design is the best of both worlds," says Davies-Keiller. "We aren't trying to reinvent the wheel with our clothes; we want clothes that leave the customer completely unaware that the garment is doing its function. That is high-performance fashion technology." DDC LAB also has a hooded sweater made of polyethylene, a polyester-Lycra blend. It regulates the body's temperature by wicking away moisture while keeping body heat in.

Other clothes hold high-tech gadgets. Levi's Red Wire DLX iPod Jeans have a pocket specifically designed to hold an iPod (with built-in docking station) and another to hold a retractable headset.

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For sneaky guys, the SpyTek's Covert Camera houses an undetectable video camera.

And music-lovers who feel compelled to blast their tunes for others might want to invest in the Lifepod Groove Master Messenger Bag, which comes with built-in speakers.

Even shoes have brains. Nike's Zoom Moire +iD sneaker has a chip that measures your mileage and syncs with your Nano; the information is displayed on the screen while you enjoy your favorite tunes.

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Smart underwear? Not exactly, but the Timeless Collection of undergarments and sleepwear for men and women by g=9.8 (the equation for acceleration due to gravity) is made from biodegradable pine fibers. They're more comfortable than they sound--the material feels like light cotton. When you're done wearing them, throw them away for recycling.

What can shoppers expect from designers in the future?

"We still have a long way to go," admits Planchon. "But things are definitely getting better. Materials are getting lighter and brighter, and design is getting more user-friendly. Pretty soon the items that hold your devices are going to be just as important style-wise as the devices themselves."