The bold, streetwear-inspired golf apparel worn by Australian professional golfer Jason Day at the Masters Tournament, often featuring Malbon Golf designs like baggy pants, loud sweater vests emblazoned with 'No. 313. Malbon Golf Championship', and bird-themed prints that have sparked debate and scrutiny from Augusta National officials.

A controversial fashion statement in professional golf, referring to Jason Day's non-traditional outfits at the Masters, which push boundaries with vibrant colors, oversized fits, and branding, sometimes requiring last-minute changes to comply with tournament dress codes.