Japan Blue High-Tech Denim Coach Jacket

Size Guide
Classic style for a casual look!

For decades, this style has been worn by famous coaches and sportsmen to keep cool and dry during their plays!

JB developed this one with a CoolMax lining and a flexible out denim shell for the ultimate comfort when you're on the move. The grand indigo dyed blend of cotton and polyester will slowly fade to a soulful light indigo look.

Unlike typical coach jackets, this one is very breathable thanks to the CoolMax lining, it's soft to the touch but will keep you cosy without overheating.

With adjustable cuffs and a waist drawstring, you can always keep cosy and adjust the fit to your liking.

If you're after a minimal sports style look with the beauty of grand indigo fading, this is a great choice.

  • 70% Cotton; 30% Polyester
  • Japanese lightweight high-tech denim with a CoolMax lining (specially developed by Japan Blue)
  • Genuine indigo is yarn dyed
  • 'JB' name tag is attached
  • Twin front waist pockets
  • Adjustable cuffs and hem
  • Once washed (minimal shrinkage)
  • Slim fit
  • Made In Japan

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How We Measure

Pants and Shorts


With the major buttoned up open the jeans and lay them flat like shown. Measure from the front where the major button closes to the back belt loop. Then double this measurement to achieve the waist measurement.

The way we measure is different from 'Side to Side', If you are not used to our method you should downsize by 1 inch.

For example, side to side measurement for The Flat Head 3002 waist is 28inch and using our method 29.25 inch.

Front Rise:

With the jeans lying flat measure from the crotch bar tack to the top of the waistband. 

Back Rise:

Spread out the crotch so the bar tack is visible, then measure from the crotch to the top of the waistband.


One inch down from the crotch measure flat across to the other side.


Flatten the leg and measure along the inseam from the crotch to the leg hem. 

Leg Openning:

Measure straight across the hem from side to side.



Lay flat then measure from the shoulder's edge to the other shoulder's edge.


Lay shirt flat and measure from pit to pit.

Sleeve length:

With the sleeve flat measure from the shoulder to the cuff.

Arm hole openning:

Measure from the shoulder down to the pitt.

Vertical length:

With the shirt facing down, Measure from below the collar to the bottom hem.