From Kiel Stuart in the March 1986 issue of The Artist’s Magazine:
The outdoor sketcher’s best friend just might be a fisherman’s vest. This multi-pocketed garment will hold pens, pencils, brushes, a small box of watercolors, oils, acrylics or pastels and even a small canteen. The fancier models boast a zip-on pouch that will hold an 8×10-inch pad. Best of all, a vest will leave your hands free; you literally wear your sketching gear.