012007
A very long run of bad nights
Cool-jams started in San Diego in 2007, for the oldest reason there is. Somebody could not sleep.
Hot flashes, most nights. Wake up soaked. Peel off a damp cotton nightshirt. Lie there in the dark waiting for the next one.
Then go looking for pajamas that could keep up, and find nothing worth buying. Cotton held the water against the skin. The synthetics felt like sleeping inside a windbreaker. Nothing on the shelf was built for the night you were actually having.
So we stopped shopping and started sourcing.
That is the whole origin story. No lab, no investors. One real problem, and enough textile knowledge to be dangerous.
02Chapter two
She was not the only one
The first pairs were made to solve one person's problem. They did not stay that way for long.
It turned out a lot of women were awake at 2am doing the same math: change the shirt, flip the pillow, try again. Cool-jams now goes out to customers in about 150 countries, and the reviews still read the same way they did in year one. Someone finally slept through.
The year the first pair was made.
Countries we ship to.
Average across 4,341 verified reviews.
Making sleepwear for people who sleep hot.
03The fabric
The fabric is the whole job
Cooling sleepwear is easy to claim and hard to build.
The part most brands skip is that breathability is engineered into the construction, not just chosen off a fiber list. Knit, weight, tightness and finish decide whether a fabric moves sweat or sits in it.
That is where the years went.
Kottinu, knitted at 159 gsm
Our performance fabric, built to move moisture off the skin and dry fast. A cotton-like hand, not slick.
Wicks, breathes, dries fast
Cool to the touch on the nights that need it. NightCool is the line built for the heaviest ones.
No itchy inside labels
No scratchy lace. No seams sitting where you sleep on them. Printed labels only.
Inspected before it ships
We control the run from fabric to finished garment, and every piece is checked before it reaches the warehouse.
042026
2026: the woman running it now also sleeps hot
Sandra took over as brand owner in 2026, and she came to it as a customer would.
She sleeps hot. She has done the 2am shirt change, the pillow flip, the lying still in the dark hoping it passes.
So the brief she set is not really a marketing brief. It is a shopping list from someone this category has let down before. Moisture-wicking, because that is the entire point. Soft and cozy, because a performance fabric that feels like a windbreaker is not sleepwear. And beautiful, because there is no reason a woman who sleeps hot should have to dress like she is going to the gym at midnight.
Moisture-wicking, soft and cozy, beautiful and functional. Not one at the expense of another.
Sandra, brand owner
That last one is the part the industry keeps skipping. Functional and beautiful was never a trade.
The range today
Three lines, one job each
NightCool
Our performance line, made with Kottinu fabric. Wicks sweat, dries fast, breathable, cool to the touch. This is the one for the heaviest nights.
Shop NightCool →
DayBasics
Soft, comfortable everyday fabric. For lounging, warm-weather nights and everything that is not a 2am emergency.
Shop DayBasics →
BambooSoft
Viscose from bamboo. Soft, easy, gentle against skin.
Shop BambooSoft →Two questions
Find your line
Start here
See it →
