Okay, so Calyspo St. Barth isn't actually converting your chunky sweaters into bikinis, but its second partnership with Clothes4Souls invites shoppers to donate gently-worn sweaters for 25% off any full-priced purchase at Calypso boutiques.

Tuesday, November 4th through Sunday, November 23rd, customers can help the Calypso Cares initiative donating to Clothes4Souls, a non-profit fighting the impacts and perpetuation of poverty by helping people in need.

Online customers can also enjoy a 25% discount via a direct monetary donation to the cause while shopping online.

Unload a few of the sweaters you never wear and pick up a new item for your Christmas vacation. Or a new sweater, because Calypso's winter collection is pretty cute.

Calypso St. Barth has boutiques at 900 Madison Ave., 654 Hudson St., 191 Lafayette St. and 137 W. Broadway.