White mathematical formulas and equations densely cover a charcoal gray ground, creating an all-over pattern of scientific notation and symbolic language rendered in a handwritten style. The composition feels like a visual representation of pure intellectual thought, with the chalk-like marks suggesting a blackboard filled with the accumulated work of mathematical inquiry. Sewn from a durable canvas-like exterior with a soft lining and made to order, in three sizes up to one that fits a tablet. A catchall for toiletries, art supplies, or small electronics, carrying an independent artist's work instead of a plain zip bag.