Saint Laurent Black Calfskin Y-Quilted Monogram Medium Loulou Chain Satchel, . One of the house’s most sought-after designs, this envelope-style bag is crafted in soft black calfskin with signature Y-quilting and black-tone hardware. The sliding chain strap with leather shoulder rest lets you wear it doubled on the shoulder or long as a crossbody. Front flap with magnetic snap closure. Inside is lined in black textile and organized into two main compartments separated by a center zip divider, plus a zip pocket along the back wall for valuables. From jeans to a sharp suit, this timeless Loulou is an effortless everyday companion.