Here is the Singi Side Pockets from Fjallraven . Now this is the thing needed if your Singi bag was needing a space boost. Or whatever because it belongs to you at the end of day. Do what you want with it! Fjallraven Singi Side Pockets Dark Olive Volume 4L Extra Side Pocket for Singi Backpack Range Metal Hook Closure Attaches with Toggles to daisy chain webbing at the side Material: 65/35% Polyester/Cotton G-1000 Heavy Duty Eco S and 500D Waterproof Nylon Description by Cameron