FAQs

The temperature-regulation benefits of 37.5 Technology have been proven in multiple studies to increase performance and keep you in your ideal comfort zone longer.¹

¹ “Beneficial effects of cooling during constant power non-steady state cycling”; Homestead, E.P., Ryan, B.J., Goodrich, J.A., Byrnes, W. C.; International Journal of Sports Medicine 2017; 38: 141-149.

In independent consumer testing, users consistently prefer products with 37.5 Technology. For example, in one consumer test of insoles made with and without 37.5 Technology, 95% of users preferred the insole with 37.5 Technology for thermal management and 89% preferred the insole with 37.5 Technology for moisture management.

There are very few end-of-life recycling options for textile products, and it takes many centuries for synthetic textiles to biodegrade in a landfill. All 37.5 materials now include an enhanced biodegradation additive to accelerate the natural breakdown of yarns and fibers in a landfill environment and reduce the burden of plastic pollution. 

In a study done by scientists at the University of Colorado Boulder, thermoregulation clothing with 37.5 Technology was scientifically proven to increase athletic performance by up to 26% by reducing the increase of core temperature during activity. Proven to decrease the rate of core temperature buildup and keep you cool more effectively than wicking. Scientifically proven to increase stamina by reducing the amount of energy used to manage core temperature. Proven to increase efficiency so you use less energy to do the same amount of work. This data can be found in the peer-reviewed journal article:¹

¹ “Beneficial effects of cooling during constant power non-steady state cycling”; Homestead, E.P., Ryan, B.J., Goodrich, J.A., Byrnes, W. C.; International Journal of Sports Medicine 2017; 38: 141-149.

Trapped moisture in your clothing, footwear or bedding is an amplifier, making hot feel hotter and cold feel colder. 37.5 Technology works with your body to adapt to its needs, keeping you in your ideal comfort zone longer. For example, testing at Inside Climate demonstrated a relative temperature-balancing effect of 5 – 19° F (or 3 – 12° C) when bedding products with 37.5 Technology were compared against standard bedding products. This means that you spend up to 88% longer in your ideal comfort zone when you sleep in a temperature regulating bedding system featuring 37.5 Technology.

Fabric property tests in a laboratory setting do not always correlate to human comfort. To test how fabrics interact with the temperature and humidity of human subjects and their relative comfort value, we test a broad range of apparel, footwear and bedding with and without 37.5 Technology.

The temperature regulating fabrics with 37.5 Technology have consistently outperformed alternatives in testing at the independent Munich-based institute Inside Climate. For example, denim with 37.5 Technology had a lower combined temperature/humidity value by up to 5.3°F compared to denim with a competing technology. And when you add more layers, you get more benefits. The clothing system was cooler by up to 12.5°F when 37.5 Technology was used in both the denim pants and briefs underneath.

37.5 Technology is the only thermoregulating technology to combine natural active particles plus enhanced biodegradation and recycled yarn options. So, you do not need to choose between sustainability and performance.  

37.5 Technology speeds evaporation and removes humidity next to your skin, helping to balance your temperature, control moisture and keep you in your ideal comfort zone longer.

No. 37.5 Technology is made from naturally occurring volcanic minerals. It is not a chemical finish and does not contain harmful chemicals.

No. 37.5 active particles are permanently embedded at the fiber level, work for the life of the product, and will not wash out during laundering.

Yes, wear testing has confirmed users prefer wearing the temperature regulating clothing made with 37.5 Technology. 

37.5 Technology traps odors and releases them when laundered or cleaned. Users have found fabrics made with 37.5 Technology stay fresher, longer.

37.5 Technology speeds evaporation and removes humidity next to your skin, helping to balance your temperature and keeping you in your ideal comfort zone longer.

37.5 Technology speeds evaporation and removes humidity next to your skin, helping to balance your temperature and keeping you in your ideal comfort zone longer.

Yes, wear testing has confirmed users prefer wearing footwear made with 37.5 Technology.

37.5 Technology works with your body to manage humidity, which provides dynamic thermoregulation to help cool when you’re hot and keep you warm when you’re cold.