MLB Arizona Diamondbacks '47 CLEAN UP
- Arizona Diamondbacks Charcoal '47 CLEAN UP. The CLEAN UP is also known as the OG of relaxed and curved hats. You'll love the '47 CLEAN UP for its adjustable strapback, garment washed softness. In fact this is quite possibly the most comfortable hat you'll ever wear, and you always look good when you feel comfortable.