New
Our most-loved undershirt now features new climate-control fabric technology for summer.
AdapTex™ powered by 37.5® Technology ensures you stay in your ideal comfort zone longer by naturally regulating your core temperature and humidity, keeping you cool when it's hot and warm when it's cold. It delays liquid sweat onset by removing moisture at the vapor stage, ensuring you stay dry and comfortable throughout any activity.
Our best-selling sweat-proof underarm shields paired with the innovative 37.5® Technology make this undershirt the ultimate base-later for every outfit to keep you feeling dry and comfortable all day.
Featuring a reversible deep scoop neckline, short seamless sleeves and a slim fit, this undershirt is made for invisible layering and will stay hidden under most styles.
Made with soothing, silky soft fabric that offers light support, this undershirt will hug your body and offer a smoothing silhouette.
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Size Guide
Fit Tips
Numi Essential Undershirts: Our undershirts are tightly fitted to the body, with some stretch to the fabric. If you fall between sizes on the chart, we recommend choosing the larger size as they are a snug fit.
Numi Sustainable Silk™: Our silks fit true to size. If you fall between two sizes on the chart, we recommend choosing the larger size for comfortability.
Product information
The Magic of AdapTex™
POWERED BY 37.5® TECHNOLOGY
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FAQs
Frequently Asked Questions
What is temperature regulating fabric?
The human body constantly produces heat, regulated by releasing moisture vapor from the skin as sweat. AdapTex™ powered by 37.5 Technology fabrics use ultra-porous minerals to increase surface area, attracting and removing heat and moisture before sweat forms. This helps keep you cooler when hot and warmer when cold.
What is the main benefit of AdapTex™ 37.5 Technology in apparel products?
AdapTex™ powered by 37.5 technology speeds evaporation and removes humidity, balancing temperature, controlling moisture, and keeping you in your comfort zone longer.
How can AdapTex both cool you when hot and warm you when cold?
Trapped moisture makes hot feel hotter and cold feel colder. AdapTex™ powered by 37.5 Technology particles absorb your body's infrared energy to speed evaporation when you're hot and retain warmth when you're cold. This technology adapts to individual needs, keeping both cold and hot sleepers comfortable.
Will I feel the difference?
Yes, consumer tests show that 95% of users prefer apparel powered by 37.5 Technology for thermal management, and 89% for moisture management.
