"Ankle zippers" refers to small openings or fastenings located at the ankles of clothing, typically pants or leggings. These zippers allow for easy adjustment or opening/closing of the garment around the ankle area. Full definition
I'm not complaining though because they turned out to be the perfect girlfriend jeans with the perfect distressed detailing and ankle zipper closure! (luckyorchid.com)
My only other pair of ankle zipper jeans are ones I also picked up from Zara. (viewfrom5ft2.com)
White skinny jeans with an extra little ankle zipper detail that we adore! (shop-stellab.com)