Etro Ladies Backpack. SKU: WP1F0002.AA001 M0019. Color: Marrone. Size: W:18,5cm H:22cm D:10cm. Etro Essential S Arnica Backpack. Etro Essential S Arnica Brown Cotton Backpack. Crafted from the iconic Paisley jacquard fabric with brown leather details, it featured a front flap with a gold-toned branded plaque, a concealed button and drawstring fastening, two leather shoulder straps on the back, and a cowhide lining.