Lacoste Izod polo shirts multicolor stack

Trade in your old summer shirt for a new classic polo from Lacoste. Photo courtesy of Lacoste

Now that summer is unofficially upon us, we're ready to clean out our closets to make way for some fresh fashions.

And Lacoste's "Royal Pains" Summer Shirt Exchange is giving us added incentive to adhere to the adage, "Out with the old, in with the new."

Through the program, New York customers can trade gently worn summer shirts for a $50 gift card toward a new one from the iconic brand. Partnering with the USA cable network and Vanity Fair, Lacoste's exchange will benefit Doctors Without Borders/Médecins Sans Frontières (MSF), and coincides with the June 3 premiere of USA's "Royal Pains."

For each shirt collected (it can be from any label -- but no holes or stains), USA will donate $10 to Doctors Without Borders, an international medical humanitarian organization that provides emergency medical care in nearly 70 countries.

"We are excited to team up with USA Network on this unique partnership supporting the efforts of Doctors Without Borders," Steve Birkhold, president and CEO of Lacoste USA, said in a statement. "Lacoste is synonymous with summer and the iconic polo, so this project makes perfect sense for us."

If you're in New York City, stop by the Lacoste store at Greenley Square Park on 32nd Street and 6th Ave. between 8 a.m. and 6 p.m. on June 3. When you exchange your shirt, you'll receive a Lacoste gift card redeemable for a new shirt at any Lacoste boutique.

All shirts collected will be donated to HELP USA, an organization dedicated to providing the homeless and people in need with housing and supportive services to become and remain self-reliant. HELP USA will distribute the shirts to their 30 transitional and permanent housing facilities across the country.

Not in New York? Customers can donate a gently worn summer shirt at all 67 Lacoste boutiques in exchange for a 20 percent discount off one full-priced item through June 20.

Speaking of giving to a good cause, here's how handbag designer Judith Leiber contributed to the Wildlife Conservation Society.