Sijo Clima Cool Sheet Review: My Houseguests Have Never Fallen Asleep Faster

Falling asleep in my own bed is a breeze, but I rarely get the same easy slumber in unfamiliar settings. Some blame the pillows; others, the mattress. While both certainly affect a bed's overall comfort rating, I personally think bedsheets have the biggest impact on your sleep setup. Rough or scratchy sheets can make even the most cloudlike mattress uncomfortable, while even the best cooling pillows are no match for a heat-trapping pillow sham. 

Sijo makes a range of bedding products crafted with sustainable fabrics, like eucalyptus, French linen, and cotton. These materials all offer their own benefits, whether it's a cooling effect or an ultrasoft feel. When it comes to the TempTune line, the primary perk is temperature regulation; the material is manufactured with unique fibers that release or absorb heat to stay at your body's optimal sleep temperature between 82 and 89 degrees Fahrenheit.

Here's why that's important: Our core body temperature decreases during the nocturnal sleep phase1, which signals to your brain that it's time to snooze. If your sleep environment is too warm—whether it's from lack of air conditioning or bedding that traps too much heat—your sleep can be negatively impacted. (And we all know the importance of getting enough quality sleep for your overall health and well-being.)

Many technical fabrics can feel, well, stiff and tissue-like. Yet somehow the TempTune sheets have the luxurious feel of hotel sheets with a high thread count. This is a result of the high concentration of OEKO-TEX 100 certified Supima cotton, which is a premium American-grown cotton known for being extra soft and durable. On a scale of softness from jersey to linen, the fabric feels closer to a silky linen—and it's only gotten softer with more washes. 

And although the light material is super breathable, it never feels too cool to the touch. Slipping between the sheets isn't a sudden cold shock to the system, like it is with many other cooling sets. Rather you get just the right amount of refreshing chill before snuggling into your comforter—at least according to my visitors.

I originally accepted a sample of the Sijo sheets last year because I intended to make them my new everyday set. But once I realized the versatility of the sheets, I knew they were better suited to a rotation of houseguests. My theory was proved correct the very first time a visitor slept on them. They woke up the next morning raving about the sheets, claiming the material was responsible for the best sleep that they've had in ages. 

Although I took my friend's word at face value, I was skeptical until another visitor tested the sheets, too. Even though they were forced to sleep on the couch, this houseguest also spent 20 minutes raving about the bedding. Despite a 25-year age gap and two very different sleep preferences, my guests were equally impressed.