In the new millennium, the fashion world is catching environmental fever as consumer demand for it increases. Today's urbane, eco-conscious casualwear designers are sharing the runways and catwalks with their haute-couture colleagues - and the accent is on comfort. Jeans and a well-fitting T-shirt have become the American uniform, whether you're attending a Midwestern university or making a red-carpet entrance at the MTV Music Video Awards.

Pima Graphic Tank - $ 45.00 Cool Cucumber Graphic. Incredibly soft, featherweight organic cotton. Easy fit. Hits slightly below hip. Made in USA. Machine Wash.

Stewart+Brown

When designers Karen Stewart and Howard Brown left Patagonia a few years ago, they formed an eponymous work partnership dedicated to functional, fashionable style. Their Ventura, California-based design studio is ground zero for clothing and accessories made from pesticide-free organic cotton and the finest Mongolian cashmere.

If you can't make it to a Stewart+Brown showroom in New York or Los Angeles, you can click here to find a retailer near you or order select items online from Vivavi.com, such as the women's fitted Treescape Graphic Tee ($55), which features a cornstalk and onion print (don't miss the matching Treescape Tote for $78), or the Pima Graphic Tank ($45), with its cool-as-a-cucumber graphic.

Share your commitment to organic living with the world by flaunting the adorable Broccoli Reversible Purse ($88), created from vegetable prints.

Beneficial T's and Patagonia

When eco-conscious Patagonia started making organic cotton T-shirts for men and women in the mid-1990s, the company started Beneficial T's as a separate division. Each year, half a million pounds of organic cotton are fashioned into tees, tote bags and hats - and the company is run by a "Chief Organic Officer."

All of Beneficial T's offerings - as well as Patagonia's imported organic lines - can be found at the chain's retail stores or online at Patagonia.com.

Our top picks for women include the Summer Lite Tee ($38), a soft organic knit that's cut on the bias for a contoured fit; the sexy tri-tone Blocker Tank ($28), made of organic cotton stretch knit; and the Purfect Polo ($34), a sleeveless fitted polo with a five-button placket and cap sleeves.

For men, can't-miss organic cotton tees include the Surf Camp T-Shirt ($24), featuring colorful photos taken from the Patagonia catalog; the Underground T-Shirt ($24), with a leafy-green motif; and the Atlantic Salmon T-Shirt ($24), which supports Patagonia's campaign to preserve the country's wild fish.

Loomstate

Loomstate has raised the fashion bar with its 100% organic cotton styles - and when it comes to organic living, the company's philosophy is brash: "People who give a shit are sexy."

Loomstate specializes in trendy jeans, T-shirts and skirts. To find a retailer near you, visit the company's website and click on "Store Finder." To shop for Loomstate apparel online, log onto Shopbop.com, where you'll find jeans constructed of both light-wash denim with moderate distressing and dark denim (from $155 to $175).

Also hot for summer: a 13" miniskirt ($119) and tees with "Sunshine" typography ($49), available in either gold or navy.