Visitors to the Pitti Uomo menswear show in Florence this month got a sneak peek of the new Cuero collection of sunglasses, put out by La Martina and Allison. The line uses La Martina's signature leather as an accent on some models, and comes in several colors. The full collection will make its debut at Mido in March, and will go on sale in optical stores in Europe that month as well.