Combining form and function, the Sling Backpack in Navy Blue Evoluzione leather is the perfect fusion between a backpack and belt bag. It has the versatility to be worn in many different styles and allows you to keep your valuables close. Slip over your shoulder the next time you head out. This model is handcrafted from Evoluzione calfskin leather, featuring clean lines and a classic yet unique design. Blending traditional craftsmanship and innovation, our resilient Evoluzione calfskin leather was first introduced by Stefano Serapian in 1965.