SWEET CHARITY: Some designers will be showing off their more generous sides next week. Zang Toi's show Wednesday will benefit the Lance Armstrong Foundation, with general admission going for $300 and VIPs paying $1,000 a pop. Attendees will get an earful from Patti LaBelle, who is slated to perform. Earlier that day, Yankee slugger Alex Rodriguez and his wife Cynthia will host a fashion show luncheon featuring the work of Venezuelan designer Nicolas Felizola. The event at Daniel will benefit the Arod Family Foundation. Attendees at Ports 1961's Sept. 7 show will walk away with a sarong designed by creative director Tia Cibani. The item will be sold through the company's Web site and Canadian retailers and sales will benefit the nonprofit Keep a Child Alive.

Meanwhile, Zac Posen is going back to school. The designer is honoring his favorite teacher at St. Ann's School for the Arts in Brooklyn Heights with a limited edition tote bag. He created the tote for DHL, which is donating all proceeds from the sale of each bag to TeachersCount, a national nonprofit organization that supports the teaching profession. The Italian leather tote comes in DHL's signature red and yellow colors and was produced in Tuscany, where Posen's handbags are made. The tote bag's $400 price includes complimentary ground delivery by DHL.

UNDER THE RADAR: With New York Fashion Week kicking off Wednesday, many designers are expected to work through Labor Day weekend with little or no relief. Isaac Mizrahi, however, is unlikely to be among them. After staging his runway comeback in February, Mizrahi has opted to produce a look book rather than a runway extravaganza for his spring collection. The look book is scheduled to arrived on editors' desks Thursday, and that same morning they can also click on isaacmizrahiny.com to watch a video of the collection and the look book shoot with Mizrahi sound bites. "My company and I felt this book and video would cater best to our couture client...and we're really excited about it," Mizrahi said. "One of my goals with couture is to present clothes that I feel are luxurious and slightly under-the-radar." But those who still want to see the actual garments need not fret: Mizrahi is making appointments to view the collection at his studio after Thursday.