This Matter Matters Pythagoras' shoulder bag has an unusual gusset of a right-angled triangle.
To make it work, mathematical calculation is involved.
• H:14 cm W: 27.5cm D:11cm
•Body : Grey, Neon orange goatskin and cow skin-leather
•Adjustable black cow leather shoulder strap
•Embossed designer stamp on body under the flap
•Blue spray painted metal chain
•Comes with dust bag