What is a Thermal Shirt?
A thermal shirt is one of those essentials worth keeping in your wardrobe. Originally developed for soldiers and outdoor workers, thermal shirts were designed to retain warmth through their distinctive textured fabric. In this article, we explore what makes a thermal shirt — from history and fabric to everyday styling.
1. History
Origins of the Thermal Shirt
The exact origin of thermal shirts is unclear, but they are believed to have emerged in the early 20th century. They were used by military personnel and outdoor workers in cold environments, valued for their warmth and mobility.
From Utility to Fashion
Originally used purely as underwear, thermal shirts gradually evolved into casualwear. Today, they are worn both as layering pieces and standalone garments.
Their unique texture and functionality made them a staple in modern wardrobes.
2. Fabric
The Reason for the Texture
Thermal fabric traps small pockets of air, helping retain warmth while maintaining breathability and flexibility.
3. Types of Thermal Fabric
Waffle Structure
The waffle knit is lightweight and versatile, suitable for layering or standalone wear.
Honeycomb Structure
Honeycomb knit provides deeper texture and stronger insulation.
Two Thermal Shirts by WASEW
GENKOTSU THERMAL
Soft waffle fabric knitted using vintage machinery for comfort and durability.
MIL THERMAL
Dense honeycomb knit with heavy yarn for durability and warmth.
Quiet Craftsmanship
Both models reflect WASEW’s philosophy — understated design, refined construction, and long-term wearability.
