The closure is made super-easy with a zipper. There are several ways to carry this bag, one of them being a detachable shoulder strap.
From Amazon
dbramante1928 Fifth Avenue - 15" Laptop Bag PURE - Handcrafted From 100% Recycled Plastic - Adjustable Shoulder Strap - Black
SmartTeck
dbramante1928 Fifth Avenue - 15" Laptop Bag Recycled - Black -