Shopping Bag
Iron Heart 367-BLK - Western - 10oz Mock Twist Twill Black
Iron Heart 367-BLK - Western - 10oz Mock Twist Twill Black

Iron Heart

367-BLK - Western - 10oz Mock Twist Twill Black


Garment Measurements | Virtual Size Chart


The Iron Heart IHSH-367-BLK Western is a hearty, reinforced piece produced from a 10 oz. sanforized and rinsed Japanese Mock Twist Twill that's appropriate as a style staple for year-round use. Using the signature Iron Heart Western pattern of a slim fit based on the 1926 original, this shirt is perfectly proportioned in length to be worn untucked for modern, vintage-styled grit. Tonal stitching combines with a reactive dyed black and grey mock twisted yarn for both warp and weft to create a textured dark charcoal in a versatile pepper palette for a stable, rigid, and hearty twill that will wear-in to convey road-warrior status. This Western has numerous and carefully considered construction and design details like the triple stitched curved shoulder and back yoke panels, which are paired with signature Iron Heart black Permex snaps on the dual flap front chest pockets, placket, and cuffs to make a piece for the stylistically sound and self-reliant. Further, internal felled seams with chainstitched construction throughout give this piece all the necessary heritage provenance, and then some. The Mock Twist Twill Western balances classic and modern applications, making it a future heirloom, a year-round go-to, and a new project piece that will only improve with wear. Built for the biker and over-engineered to start, the Iron Heart 367-BLK Western tests the limits of what can be artfully woven and sewn, delivering a lifetime of durability in a road-ready design.


  • Modern Fit
  • 10 oz. Japanese Mock Twist Twill
  • Proprietary Fabric
  • Sanforized - One Wash
  • Reactive Dyed Black Warp & Grey Weft
  • 100% Cotton
  • Tonal Stitching 
  • Dual Snap Front Chest Pockets
  • Triple Stitch Front & Back Yoke Panels
  • Dual Snap Cuffs
  • Black & Nickel Permex Snaps 
  • Felled Seams
  • Chainstitched Throughout
  • Bartack Reinforced
  • Limited Seasonal Release
  • Made in Japan


Model Measurements: 5'7" | 135 lbs. | 37" Chest | 30" Waist - Wearing Size S

Iron Heart Shirting sizing is graded in small increments. The 367-BLK Western runs true to Iron Heart sizing and is made with a sanforized, once-washed fabric with most shrinkage removed. With regular use, one can expect up to .5” of stretch in the chest over the long term.

Our Method of measuring is different than Iron Heart. We recommend consulting our Sizing Guide and using our Virtual Size Chart to reference our Method when purchasing.

Please feel free to Contact Us for additional assistance.

About Iron Heart

After 20 years of working in the Japanese garment industry, Shinichi Haraki established Works Inc., a.k.a. Iron Heart, in 2003 as a heavyweight clothing brand initially geared toward Japan’s motorcycling community. Iron Heart creates classic and timeless clothing crafted out of the finest materials and achieves the highest standards by closely working with fabric development, garment manufacturing, and the brand’s cult community. Over the years, Iron Heart has become the definition of bullet-proof garment construction. Staying true to their slogan,... View All Iron Heart Products