Simple made better.
Its warmth comes from wearable technology.
HEATTECH Inner
Protecting yourself from the cold means dressing in layers. UNIQLO wanted to change that common conception. The fabric itself creates warmth by using the moisture that evaporates from the body. In order to develop this revolutionary innerwear, we made over 10,000 fabric prototypes. Even now, more than 20 years after its creation, we continue to develop new functions and materials. This season, we bring the latest wearable technology to winters all over the world.
Protecting yourself from the cold means dressing in layers. UNIQLO wanted to change that common conception. The fabric itself creates warmth by using the moisture that evaporates from the body. In order to develop this revolutionary innerwear, we made over 10,000 fabric prototypes. Even now, more than 20 years after its creation, we continue to develop new functions and materials. This season, we bring the latest wearable technology to winters all over the world.
Product stories
HEATTECH is made of four types of fibres.
The reason why HEATTECH is multifunctional, including moisture absorption, heat retention, heat retention, and antibacterial and deodorising* properties, is because it uses four types of fibre** that have different roles. Each fibre plays an important role and provides comfort when worn. The rayon fibres generate heat when it absorbs moisture, the acrylic fibres contain a lot of air and retain heat, the polyester fibres quickly absorb moisture and dry, and the polyurethane fibres have excellent stretch properties. By knitting these together, we have created a highly functional innerwear. But it's not just about functionality; there's also the questions of how we can create a beautiful surface feeling despite the use of multiple materials, and what combination of materials responds to all kinds of cold weather. Countless trials and errors are hidden behind this one piece of fabric.
*Not including babies.
**Applicable products are HEATTECH and HEATTECH Ultra Warm. (HEATTECH Extra Warm is different.)
Natural materials for a renewed HEATTECH.
Combining cutting-edge textile technology with the warmth of natural fibres; beyond this blend, there is a warmth that people have not yet discovered.UNIQLO : C HEATTECH cashmere* uses yarn that is approximately half as thin as the yarn used in cashmere sweaters, giving you the warmth of standard Extra Warm HEATTECH with approximately 70% of the weight. Furthermore, we also deliver the gentle comfort that only cashmere can provide.
*Materials: 57% acrylic, 28% rayon, 9% cashmere, 6% polyurethane.
Children's comfort is the blueprint.
We created HEATTECH for children by looking directly at the functions that children really need. The skin side of the fabric is made of cotton for a gentle feel. We also choose threads that are comfortable against the skin for the stitching. We use stretchable fibres to allow children to move their bodies to the fullest, and we have also increased the durability of the collar area, taking into account children's unique behavior of stretching the neck wide. We always care about the comfort of our children: it's an important blueprint.
Product stories
Overcoming the barrier of “innerwear” next.
HEATTECH, which was born as an innerwear, has moved on to the next stage. The Ultra Warm series, which is made of a fluffy knitted fabric with a brushed lining, contains more air and provides more warmth than regular HEATTECH. The surface has the stitching and collar width used for T-shirts, giving it a look that can be worn as a single piece. It's easy to layer and matches a wide range of winter outfits.
Combining natural fibres with cutting-edge technology.
For innovative warmth and further evolution. Blending cashmere, a natural fibre, with HEATTECH's chemical fibres. There were immense difficulties waiting for us. Cashmere is a very delicate material. Vulnerable to heat, shock, and chemicals. There are also individual differences in thickness and length. It was a challenge like making HEATTECH from scratch. We visit the producing areas many times to find the ideal raw wool. We use AI to verify the uniformity of the woven fabric. Even the dyeing machine was specially designed to reduce the load on the fabric as much as possible. It is not only cashmere that we have combined. But also cutting-edge technology and a passion for making clothes.
*Contains 9% cashmere.
