# Iron Discipline | No. 379, Unisex Long Sleeve T-Shirt

The Iron Discipline long sleeve brings a tactile, sketch-book aesthetic to the concept of physical and mental endurance. Using a cross-hatch pencil technique, the design highlights the recessed weight markings and the vibrant yellow grip against the depth of the black iron. It is a thoughtful long sleeve for the cooler hours of a focused day.  
  
Consistent effort leaves its mark on the soul just as it does on the iron. Strength is a slow build.  
  
Inside Collar Quote: Quiet Strength | 静かな強さ

## Details

- **Price:** 40.0 USD
- **Vendor:** ichinichi.studio
- **Type:** Long Sleeve T-Shirt

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| XS | 40.00 USD | In stock |
| S | 40.00 USD | In stock |
| M | 40.00 USD | In stock |
| L | 40.00 USD | In stock |
| XL | 40.00 USD | In stock |
| 2XL | 40.00 USD | In stock |

## Images

- Hand-drawn kettlebell with yellow grip and carved numbers on a Long Sleeve T-Shirt.
- Man wearing a gray long-sleeve shirt with a kettlebell design in a gym setting

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> Source: [ichinichi studio](https://ichinichi.studio/products/iron-discipline-no-379-unisex-long-sleeve-t-shirt)
> Updated: 2026-05-08