"Bamboo" baby clothes are made of rayon

Marketing...

When I was four months pregnant and still barely aware of the existence of sleep sacks, a mom giving recommendations handed me one made of bamboo. “Feel—soooo soft,” she said. I reached out to caress, and it really was soooo soft. This was my introduction to the cult of bamboo...
The Instagram brands that popularized bamboo for babies have also perfected the art of scarcity-induced demand: Every so often, they drop limited-edition prints that can sell out in minutes. So intense is the competition that moms resell them on Facebook for three, five, even 10 times the retail price; one confessed to reselling a $98 blanket for $1,000...
Imagine my surprise, though, when I committed the act of serious investigative journalism that is reading a clothing label. The “magical,” “buttery soft” bamboo fabric that so many moms have been obsessing over? It’s rayon. Yes, rayon, the material best known as what cheap blouses are made of. Rebranded as “bamboo,” rayon has taken on an improbable second life as the stuff of premium, collectible baby clothes...
And what exactly is rayon? It is neither natural like cotton nor synthetic like polyester. Rayon is in-between, a semisynthetic material made of the cellulose extracted from plants. A century ago, manufacturers used wood as feedstock, but these days they also use bamboo...
But rayon is a “weak fiber,” Sarkar told me. When rubbed together, the fibers tend to break and curl—a.k.a. pilling—which explains why bamboo baby clothes come with unrealistically fussy laundry instructions: line dry, lay flat to dry. Who has time when your newborn is pooping on three outfits a day? I tossed it all in the dryer, and sure enough, the bamboo clothing started to pill...
I did, however, continue marveling at the stretch in the bamboo—sorry, I mean rayon—pajamas. I found myself reaching for them over cotton ones because they were simply easier to stuff my baby’s ever-chunkier thighs into. But rayon isn’t inherently that stretchy, Gopinath told me. The stretch in “bamboo” baby clothes comes from the 3 to 5 percent of spandex blended into their fabric...

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