Yarns and fabrics developed in pursuit of ultimate cooling

The core of the yarn is made from cooling nylon, surrounded by polyethylene with even higher cooling performance, resulting in an ultra-fine yarn composed of approximately 100 filaments.
This ultra-fine yarn is then woven together with nylon and polyurethane yarns using a proprietary knitting technique.

Dual cooling technology: Contact cooling

Peak contact cooling performance from the moment of wear

Cooling performance: 260%
A proprietary cooling fiber is used, achieving a contact cooling value of 0.524, the highest level, for exceptional cooling performance.

*Contact cooling (Q-max: W/cm²)
Based on a reference value of 0.2, the cooling performance is approximately 260%.

Dual cooling technology: Moisture-absorbing cooling

Peak cooling of up to −7.7°C driven by in-bed moisture
The ultimate moisture-absorbing cooling

A specialized material absorbs humidity and perspiration generated during sleep, lowering temperature as moisture is taken in.
Effective cooling performance continues through the night, with cooling functionality confirmed even after 50 wash cycles.

In the test, participants wore the sleepwear, and a mist was applied to simulate perspiration.
Surface temperature was then measured using thermography, resulting in a temperature of 26.3°C, which corresponds to the ideal in-bed sleeping environment.
(Mist application: 60 sprays, approximately 6.5 g of water)

Absorbing moisture and efficiently converting it into cooling

This innovative technology delivers cooling while reducing clamminess, helping maintain comfort during sleep.
In testing, when the moisture-absorbing component was immersed in water on the right side, a decrease in water temperature was confirmed.

Designed for everyday wear, antibacterial and deodorizing performance matters

The fabric is treated with antibacterial and deodorizing processing to help prevent bacterial growth during the summer months.

Highly effective and wash-durable

Delivering 2.5 times the antibacterial deodorizing standard (antibacterial activity value: 2.2), with effectiveness maintained even after 10 wash cycles.

Stress-free comfort through a dual-layer fabric construction

The side that touches the skin is smooth, reducing friction while incorporating a cooling fabric with moisture-diffusion properties.
The outer layer uses 100% cotton with high moisture absorbency, offering a gentle feel on the skin and an efficient design that disperses humidity.
During summer sleep, perspiration is said to exceed 500 ml, yet this highly moisture-diffusive fabric supports a comfortable sleeping environment.

Reducing uncomfortable clamminess during sleep

By combining materials with high moisture absorbency and moisture-diffusion performance, humidity—one of the primary causes of sleep disruption—is efficiently absorbed and released.
This helps regulate moisture levels effectively, supporting continued comfort even when perspiration occurs.

A non-constricting design for more comfortable sleep

Designed to support comfort during pre-sleep relaxation and to avoid interfering with natural movement during sleep.
Larger armholes are incorporated, and excessive pressure from elastic or ribbing is minimized, helping maintain a comfortable range of motion and reduce stress throughout the night.

By reinforcing the neckline, the design helps prevent deformation and stretching, maintaining a clean, well-defined neckline.

The T-shirt hem features a gentle curve, with side slits on both sides to add a light, airy feel.

Resistant to transparency, even when worn alone
Less prone to visible perspiration marks

The dual-layer fabric construction reduces transparency even when worn on its own and helps minimize visible perspiration marks.
This allows for easy wear and a design suitable for brief outings as well.

Perspiration visibility test

When mist was applied to the inner side to simulate perspiration, no visible staining appeared on the outer surface.