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Don’t throw away those Livestrong bracelets — they may still come in handy

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Silicone bracelets à la the Livestrong era may seem like the ultimate throwback, but thanks to an injection of some pretty interesting low tech, they’re making quite the comeback. Researchers at Oregon State University have found a new use for the brightly colored wrist bands, and while it won’t track your heart rate or send you text notifications, it will help you detect environmental pollution.

In a recently published study, OSU scientists asked 92 preschool children to wear these once popular bracelets to determine their degree of exposure to fire retardant chemicals, which the researchers suspected to be present as an environmental hazard. Because the bracelets are comfortable, non-toxic, and really don’t pose a risk to the wearer in any manner, they’re ideal tools for monitoring the presence of chemicals. And because silicone absorbs compounds floating about in the air, these bands serve as an excellent basis for an experiment along these lines.

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The children wore the bracelets for a week, after which the OSU team tested the silicone and found that 60 percent of the bracelets contained quantities of flame retardants. Moreover, the researchers were able to detect half of the chemicals they set out to search for, which included several that are supposedly no longer made in the U.S. This, researchers say, could be the data that parents and government officials need to make changes necessary to protect children from these potentially harmful chemicals. After all, the recognition of a problem is the first step.

While this flame-retardant study was the first use of silicone bracelets in a scientific capacity, researchers are hopeful that they can use the same technique in future experiments as well. OSU believes that these bands could be useful in examining the interaction between chemicals, the environment, and human health. Presently, researchers are conducting another study regarding prenatal exposure to certain compounds by having expectant mothers wear wristbands in the final trimester of their pregnancy. So don’t get rid of that yellow band just yet — you never know when it may come in handy.

Lulu Chang
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Starfish-inspired patch solves key issues for wearable heart sensors
Heart rate sensor inspired by Starfish.

The domain of wearable devices has grown by leaps and bounds, not just in terms of mass adoption, but also owing to some astounding innovations. Wearable heart rate sensors can now measure everything from heart rate and blood oxygen levels to ECG in form factors ranging from a watch to finger rings.

These sensors, however, come with an inherent set of problems. Motion artifacts arising from movement or vigorous activity alter the blood flow and affect their accuracy. Optical heart rate sensors (photoplethysmography or PPG tech) also struggle with darker skin tones, tattoos, or even body placement. 

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The Chairman™ Pro package is on sale — and it’s the only shaving kit you’ll ever need
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There’s grooming, and then there’s grooming with intention. If your current routine feels more like a chore than a ritual, it might be time to rethink your tools. The Chairman™ Pro Package from MANSCAPED® is a full-face grooming system that doesn’t just clean you up—it sharpens your whole look. Right now, it’s available for $169.99 (11% off the usual $189.97), and you can drop that price even further to $159.99 when you subscribe to the Chairman Pro Package + Peak Hygiene plan. Throw in free shipping, and it’s a solid deal on a seriously well-thought-out kit.
One kit. Total control.
At the heart of the package is The Chairman™ Pro Electric Foil Shaver, MANSCAPED® top-tier tool designed for guys who want versatility and comfort in equal measure. This isn’t your dad’s shaver—it comes with two interchangeable SkinSafe® blade heads: a four-blade foil for smooth, clean-shaven skin, and a stubble trimmer that nails that 5 o’clock shadow look without wrecking your neckline.

Want a little definition without going full lumberjack? The included two length-setting stubble combs help dial in the perfect length. With FlexAdjust™ Technology that adapts to every jawline and a precision trimmer edge for hard-to-reach spots, this thing is engineered for the real world—where your face doesn’t grow hair at perfect right angles.

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You Asked: What’s the most impressive thing you saw at CES?
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On today’s special edition of You Asked, we tracked down each of our editors and put them on the spot to find out what they thought was the most impressive thing they saw at CES 2025 in Early January. Let’s find out what they had to say.
Panasonic Z95B

There’s been some really cool TV tech at CES, but the thing I’m most excited about is the new Panasonic Z95B. Instead of the regular OLED display structure we’ve seen in recent years with MLA technology, this uses a four-layer panel structure. It features individual red, green, and blue layers (two of the latter) for the emissive light.

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