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These days, if you want to help someone, you do not have to give up your shirt; you can just buy one.

The Edun ONE Tee from the celebrity-studded charity effort is a double play. It’s made in a factory in Lesotho, Africa, which helps boost the local economy, and $10 from each shirt goes back to Lesotho to provide AIDS medication for factory workers and their family members. $40. www.one.org/blog/2007/10/31/celebrity-edun-one-shirt-auction-is-live/

Zooey’s Green Line T-shirts benefit Healthy Child Healthy World with $2 from each sale, and the shirts are 100 percent organic cotton. $82. www.zooeytees.com

You pick the shirt and the cause, and Tonic Generation passes on 40 percent of its product revenues -- that’s revenues, not profits -- to pay for school supplies, wells, mosquito nets, or whatever is needed. $45.

Yellow Bird Project asks musicians to design tees, and then it sends the profits to each musician’s charity of choice. We had a tough time picking a favorite, but the newest one to the mix is designed by the Shins for the Nature Conservancy. $25. www.yellowbirdproject.com

Glamour magazine commissioned five designer tees, issued a limited edition of each, and teamed up with Malaria No More to buy three mosquito nets for each tee sold. Shown: Thakoon’s version. $68. www.glamour.com/fashionbeauty/fashiongivesback

Who better to design a tee than an artist? Part of It puts an artist’s handiwork on its shirts and donates a portion of the profits to a charity of the artist’s choosing. Michael Perry’s “It’s Just You and Me” tee benefits NARSAD, an association that researches psychiatric illnesses. $28. www.partofit.org