Amazon.com: Topo Designs Daypack Classic Backpack – Daily 。Topo Designs Sling Bag Unisex Backpack Slim vertical profile One Diagonal Strap Crossbody wear like a messenger bag 2 or 3 point strap attachment system for secure fit when biking Perfect for a day trip or a bike ride Clean Like New Rugged Durable construction Diamond shape leather patches Heavy duty YKK zippers with paracord pulls Black Exterior, Neon Yellow Interior, Red Stitching Made in the USA Deigned for light travel, or urban use. Perfect for biking. 5.25\" deep 9\'25\" wide 18\" long Thick Comfortable Strap 3\" wide