What Are Cool-jams?
Are you looking for a way to battle those night sweats or a great pair of quick drying travel pajamas? Or perhaps it's menopause pajamas that you need? Our Cool-jams fabric is a specially designed polyester Microfiber that has been engineered to feel like soft cotton but has all the attributes associated with the fastest wicking and drying material in the world. This ground-breaking Cool-jams technology, with its amazing "cotton-like" comfort and feel, offers the superior odor and bacterial control of our natural antibacterial treatment and delivers unparalleled performance in moisture management, lasts 6 times longer than cotton fabric, maintains color sharpness with minimal fade and is a viable alternative to cotton in any application where the inferior attributes of cotton have been considered "the standard".
How Were Cool-jams Developed?
Our Cool-jams fabric was developed initially for the Canadian armed forces. The military had requested development of a fabric that would look and feel like cotton but had other characteristics to include wicking ability, temperature regulation, quick drying ability, Anti Microbial longevity and effectiveness, Anti-pilling, washability, breathability and wearability. Our proprietary technology was later engineered into our Cool-jams sleepwear which makes Cool-jams the most innovative and advanced performance sleepwear collection available anywhere. Once you try Cool-jams Wicking Performance Sleepwear, we're sure you'll never want to sleep in anything else again.
Let us explain more about the science behind our Cool-jams products:
Moisture Transference System (MST)
MST microfiber technology uses very fine fibers which are made into long strand fibers called filaments. Each filament is less than 1 decitex in measure, finer than a strand of human hair. Five to 8 filaments, each filament having slightly different performance capabilities, are twisted together to form a fine thread. Due to the unique blend of filaments, and their configuration within the thread, this creates a greater surface area for moisture to travel along the thread. These threads are then knitted together in a specific pattern which increases the speed of moisture movement through the material.
MST is a three step process:
- as the body perspires, moisture is transferred through the material from the skin to the outer layer of clothing, a process called moisture absorption or wicking;
- the moisture spreads over the surface area (moisture transport or disbursement);
- the disbursement process allows the outer air to evaporate the moisture (moisture drying or evaporation).
As moisture is pulled away from the body it carries with it the body’s built up heat, helping to regulate body temperature. This is an invaluable process as it also minimizes excessive temperature drops in the body during the cool down period after intense physical activity. MST technology provides body heat regulating while minimizing energy expended to keep the body cool and comfortable.
Cool-jams fabrics disperse moisture over larger areas in record time for faster drying and optimal wearer comfort.
CAPILLARY ACTION and AIR FLOW MANAGEMENT
Capillary action is the movement of moisture (liquid along the surface of a the fabric (solid) caused by the attraction of moisture molecules into the fabric molecules. Maximizing the capillary action of the fabric increases its ability to absorb moisture off the body to its outer surface. Cool-jams fabrics disperse moisture over larger areas in record time. Once on the surface of the fabric the vaporization of moisture molecules begins.
MST technology can be constructed to suit the performance characteristics for the conditions of use. Fabrics can be constructed to reduce or accelerate air flow (e.g. in cooler conditions where tighter weaves and increased density allows for warmth to be captured and retained while allowing for moisture disbursement).

Antimicrobial Technology
Cool-jams® proprietary completely natural antimicrobial technology enables superior odor and fiber degradation resistance in our fabrics through the use of a powerful yet natural antimicrobial agent. The Cool-jams® antibacterial treatment is integrated into the fabric in a manner which allows for complete protection of the fabric and has been proven to be consistently effective with no tendency to cause discoloration.
The superior performance of this new generation 100% natural antimicrobial technology has been achieved by combining application expertise with proprietary nano-technology manufacturing processes. The ultra-fine particles adhere more effectively to the fabric for longer protection and is 100% environmentally friendly.
Laboratory results confirm that the antimicrobial properties of our proprietary antibacterial agent remain strong after 50 or more machine washes – a powerful benefit for consumers of sports and leisurewear. In trials, using typical application processes on Cool-jams fabrics, the bacterial kill rate after 50 machine washes was 99.9%.
With Cool-jams® technology your Cool-jams Sleepwear will always stay fresh and odor free.
What's Different About Cool-jams?
At Cool-jams we believe that cool is not just a vibe or way of being hip, but rather a better way to sleep. Finding comfortable pajamas remains a major challenge for many. Fortunately, there's Cool-jams, high-performance pajamas that are lightweight, wrinkle-resistant and constructed to last. We have worked hard to create a super soft collection of products without uncomfortable seams, itchy lace or inside labels. You'll find that Cool-jams are some of the coolest, softest and most functional sleepwear that you'll find anywhere.
Cool-jams™ was recently selected as one of the most innovative apparel companies in the US. Let us explain more about why Cool-jams received this honor and why we have sold more wicking pajamas around the world than any other wicking pajama brand.
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Super Soft and comfortable: No itchy labels, lace or uncomfortable inner seams. Our product development team has worked hard to bring you a collection of hard-working functional, yet stylish collection of comfortable sleepwear.
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Wicks heat and moisture and dries faster than regular cotton, terry, poly/cotton, and any other wicking brands tested: Side-by-side testing shows that Cool-jams sleepwear absorbs moisture, wicks heat and moisture and dries faster than cotton, poly/cotton or any other wicking performance fabrics tested. Cool-jams provide an incredibly effective way to deal with night sweats, hot flashes or other temperature regulation problems. Don't settle for an inferior wicking products when you can sleep in Cool-jams Sleepwear.
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Top-performing travel pajamas: Cool-jams™ are lightweight, quick drying, compact and wrinkle-resistant, making them awesome travel pajamas for cold or warm weather. You can rinse them out in the sink and hang them up to dry in the morning, and they'll be ready to wear when you need them that evening.
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Regulate body temperature more effectively than regular cotton: Regular cotton fabric (loop terry, velour, woven or knit) absorbs moisture but dries very slowly, thus trapping the moisture next to your skin. Our innovative moisture-wicking smart fabric absorbs both heat and moisture quicker than regular cotton, draws the moisture away from the skin and evaporates quickly, keeping your body temperature controlled all night. When you're hot, the fabric keeps you cool. And when you're cold, the fabric will keep your body temperature just right. With Cool-jams, you'll never feel too hot or too cold, always just right!
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Quick drying: Cool-jams sleepwear dries four times faster than polyester, terry, velour or regular cotton pajamas and twice as fast as other leading wicking pajama brands.
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Feel like cotton: Our micro-fiber moisture-wicking smart fabric is unlike any other wicking pajama in the marketplace. Cool-jams are super soft with a silky cotton-like feel, even though the fabric is 100% micro-fiber. Many wicking fabrics have a sticky polyester hand feel, but not Cool-jams™. In fact, many of our customers tell us that Cool-jams are the most comfortable pajamas they have ever worn.
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Lightweight: Our comfortable pajamas are made of the lightest and coolest micro-fiber you will find anywhere. They never feel thick and heavy like some sleepwear fabrics. The average weight of our pajamas is only 6-14 oz. (depending on the style/size).
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Unsurpassed quality control: Cool-jams has complete control over all aspects of our comfortable sleepwear production from weaving our fabric to stitching our pajamas. What better quality assurance could you have? Every Cool-jams garment is produced with quality in mind and passes multiple inspections and testing before it arrives at our warehouse.
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Doctor recommended: More gynecologists and oncologists recommend Cool-jams for night sweats and temperature regulation than any other moisture wicking sleepwear brand.
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Odor- and bacteria-resistant: Our proprietary natural antibacterial treatment keeps Cool-jams fresh and odor-free.
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Machine-washable: Cool-jams are machine-washable and easy to maintain. Wash in cold water and hang to dry, and they'll be ready to wear in less than two hours.
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Wrinkle-resistant: Our pajamas pack beautifully and are resistant to wrinkling.
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Shrinkage-resistant: 100% shrinkage-free. Cool-jams will never lose their original shape.
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Beautiful contemporary styling: Our team of designers is always working on new styles. Visit our product pages to see our beautiful contemporary collection of wicking pajamas and nightgowns. Why settle for frumpy when you can look great in Cool-jams sleepwear?
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Cool-jams offers temperature-regulating bedding products to complement our award-winning sleepwear: For convenient one-stop shopping, Cool-jams now offers very effective temperature-regulating bedding products. We've searched the world for the most comfortable and effective temperature-regulating products and are proud to offer a complete selection of cooling mattress pads, temperature-regulating sheets, cooling pillows, cooling blankets and pillowcases.
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Percentage of every purchase goes to charity: You can always feel great about every purchase you make at Cool-jams because we automatically donate a percentage of all profits to women- and family-oriented charities. Cool-jams, Inc. helps the world on a daily basis, one order at a time.
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International shipping: Cool-jams has sold more wicking pajamas worldwide than any other wicking pajama brand. In fact, we ship to 150 countries around the world.