By Lisa Neff

Contributing writer

Green, as one T-shirt slogan proclaims, is the new black.

So in celebration of Earth Day, which takes place April 22, CFP decided to offer a quick guide to green clothes for a blue planet:

Last spring Anvil Knitwear introduced a line of organic cotton T-shirts—not fancy, but super soft and in cool colors. This spring Anvil is debuting the newest addition to its sustainable collection—AnvilRecycled shirts. The recycled Ts are made from apparel cuttings, upholstery and trim fabric, yarn waste, industrial fibers and tire cord. The clippings are sorted by color, chopped into a fine material and spun back into yarn to make T-shirts. www.anvilknitwear.com

Bono, Ali Hewson and Hard Rock have partnered to produce a T-shirt to benefit African cotton farmers and to create jobs for African garment workers. The 100-percent cotton shirt features an image designed by Bono—a fish soaring through the moon and stars and the words “fish can fly …” www.hardrock.com/rockshop

Put some “hip” in the T-shirt on your back with the organic shirts at www.302designs.com. Poets, artists and designers collaborated in an organic process to create organic limited-run T-shirts. For the clubs, consider the Crescendo—which makes a statement, “There’s a fire in me, a passion so hot, that if you tapped it, you’d get burned.” For the Pride parade, put on Free, which proclaims, “When I grow up, I want to be free.” www.302designs.com

Alternative Apparel’s fitted short-sleeve heather crews look like old-fashioned gym shirts but are made of the latest eco-friendly fabric. www.forthefit.com

Sustainable styles: DDCLAB’s spring men’s collection features designs made from Ingeo fiber—an innovative material made from 100-percent annually renewable resources (not oil) and also biodegradable. The casual collection can be found at Nordstrom’s and two DDCLAB retail locations—one in the Meat Packing District of New York and one on Melrose Avenue in Los Angeles. www.ddclab.com

Soy on the skin: The briefs, trunks, jocks and crew neck T-shirts in the Tactics collection created for Undergear are unique in the underwear market. They are made of a blend of Spandex, for a good fit, and soy, for a bluer planet. www.undergear.com

Over the shoulder: You get asked “paper or plastic” and told a good alternative is cloth. What about recycled? Rebagz are colorful bags made from recycled juice packs and nylon rice bags—and they retail at the low end, $15, and high end, $135. www.halftheskydesigns.com

Footprints: A motto in our preserves is “take only pictures, leave only footprints.” How about leaving footprints made by Terrasoles shoes—casual, functional, affordable and so comfortable you won’t want to plant a step in anything else. And, yes, environmentally friendly, made with recycled fleece, bamboo, organic canvas, recycled soles and packaged in recycled boxes. www.terrasoles.com

Cool heads: Tilley Endurables’ TH8 Hemp Hat wears like soft linen, provides 98 percent protection from the sun’s harmful UV rays, resists mold, salt water and mildew. It also comes with a lifetime guarantee against wearing out, but don’t expect to make a claim—hemp is the world’s strongest fiber. www.tilley.com

Warm wraps: If you didn’t think it possible to bring back leg warmers, look at BabyLegs. Then try on a pair—on the legs or the arms. These trendsetting knits are modish, fresh, funky and way original. They also come made of organic cotton. The name suggests these warmers are made for babies—and they are. But they’ve also become trendy among teens and older. www.babylegs.net

Suds for duds: Consider an old standby with an update for laundering Earth Day clothes. Baking soda has been around since about 1846. Arm & Hammer debuted its baking soda in a recycled paperboard box in 1907—long before recycling was en vogue. The makers now recommend using baking soda to get clothes cleaner and fresher and as a less chemical alternative to bleach. A factoid—Arm & Hammer debuted the first non-phosphate detergent in 1970, the same year the company was the sole corporate sponsor of the first Earth Day.

No wire hangers: The Magic EcoHanger is a 100-percent recyclable paperboard hanger—a good alternative to the wire and plastic hangers that fill landfills. You might have noticed some clothing brands use the hangers to promote a green rep, including Joseph Abboud and Dockers. You might have heard that at a Vegas conference Paris Hilton and Alyssa Milano left with a few cases. Want some for your closet? Go to www.hangernetwork.com.