The product name comes from the fact that newcomers (rookies) often wore loose pants around their buttocks when they joined MLB in the 1930s and 1940s.

It comes with an elasticated drawstring waist and adjustable elastic at the legs.

The high density of the dotsume knit gives a thick fall to the fabric, making it standout from your standard sweatpants.

Fits true to size.

Origin: Made in Japan

Composition:

100% Cotton  
 

Garment Care: 

Do not use fabric softener, dry item in shade.