This New Smart UV-Detecting Necklace Aims to Protect You From Sun Damage


If you have a hard time remembering to reapply sunscreen or are worried about sun damage, a new piece of smart jewelry may be the answer. On Thursday, The90, a preventive skin health wearable company, launched The90 Gem, a pendant necklace with a sensor that reads real-time UVA and UVB exposure. 

UVA rays can contribute to long-term skin aging and increase the risk of skin cancer. UVB rays can cause sunburns, but both types of ultraviolet radiation can damage the skin over time.

The90 was founded by Stacy Salvi, who previously led the acquisition of Fitbit by Google and is an expert in health tech wearables. Salvi wanted to help women have more control over their sun exposure data, which is one of the key factors in maintaining healthy skin free of sun damage.

A The90 spokesperson told CNET that the necklace was designed with women in mind because the company’s research found that this demographic tends to already be knowledgeable about sun protection. “We found that women are both the most familiar with the benefits and risks of UV exposure and the most interested in finding ways to mitigate those risks,” they said. However, The90 plans to expand its product line in the future to serve men and children as well. 

“The90 transforms sunscreen from a one-time morning ritual into an adaptive, responsive system built around your actual UV load,” Salvi said in a press release.

The necklace’s pendant collects UVA and UVB data, recognizes your skin profile and sunscreen use and whether you’re wearing protective clothing. The idea is to help women become more aware and receive actionable reminders about their sun exposure, sunscreen application timing and healthy skin aging. 

“Women are already investing in SPF, treatments, tools and routines to protect their skin, but when it comes to sun exposure, most of us are still guessing,” said entrepreneur Lauryn Bosstick, one of The90’s investors and podcast host and founder of The Skinny Confidential, in the press release.  

The90 Gem syncs with the The90 app on your phone and has you set up a personalized skin type profile. You’ll identify your skin type, your daily sunscreen use and other sun protection habits. 

Besides detecting UVA and UVB rays, The90 will send you sunscreen reapplication reminders, personalized guidelines on limiting UV exposure and other features based on real-time readings and your needs.

The90 Gem is available now for $299, but there’s an exclusive deal for $199 for The Skinny Confidential community. 





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Being a founder is awesome. And it also really sucks.

It’s a huge amount of stress, disappointment and uncertainty, with little appreciation or guidance.

It’s perfectly normal to find yourself questioning what it all means.

I’ve been there myself… questioning whether the sleepless nights and stress was worth it. And now, I’m often the person founders turn to when they do the same.

In this essay, I wanted to talk about happiness, purpose, and how to get more of it when you’re constantly living in survival mode.

Three Types of Happiness

Martin Seligman, the father of positive psychology, describes three distinct paths to happiness: the pleasant life, the engaged life, and the meaningful life.

  • The pleasant life is about pleasure—closing a deal, hitting a milestone, getting some great customer feedback. As a founder, there’ll be phases where pleasure is hard to come by. Clearly, you can’t build a founder life on pleasure alone.
  • The engaged life is about flow—the state when you’re fully absorbed in solving a hard problem. Most founders have this in spades early on, but as their companies grow, their role can evolve away from flow. Being out of flow is often a signal you need to redesign your role.
  • The meaningful life is about purpose—the sense that what you’re doing matters. Unlike pleasure and engagement, meaning doesn’t require things to be going well. It sustains you through the hard times, not just in spite of them.

So when times are hard, meaning is what we can return to. Unlike pleasure and engagement, meaning is up to you.

And it’s work you can start right now.

How to Make Meaning

So how do you actually build meaning, even when you can barely see past next week? A meaningful life has three components:

  • A meaningful future
  • A meaningful past
  • A meaningful present

Creating meaning in each is an act of creativity. It’s an active process in which you assign meaning to things.

If you aren’t intentional about this, your brain will assign meaning for you. And if you’re not feeling great, your brain will come up with interpretations that match and then reinforce the negative feelings.

What I’m about to share with you is the process I run through when my clients start questioning themselves, and what they’re building.

1. A Meaningful Future

In Man’s Search for Meaning, Viktor Frankl documented the atrocities of the concentration camps. He writes:

“Any attempt to restore a man’s inner strength in the camp had first to succeed in showing him some future goal.”

A lot of modern therapy fixates on the past. But Frankl realised that getting clear on our future goal is even more powerful.

When it comes to founders, they often have goals… but unless you’re fully pumped, your goals need refinement. 

I commonly see three issues with a founder’s goals:

  • They have too many goals. We accumulate goals over time, but we rarely sit down and remove goals. For example, you had goals when you were 18 years old. Most of these have been parked, but some might still be guiding you now.
  • The goal isn’t big enough. For most founders, the more ambitious the goal, the more energy it unlocks. Just increasing the size of the goal can act as a powerful clarifying force for what matters.
  • The goal isn’t framed by its meaning. It’s the difference between ‘I want to make $100M’ versus ‘I want to help 10,000 customers avoid what happened to me’. One is financial, the other is personal.

Refining and reconnecting to your primary goal is critical for building a life of meaning.

Questions to work through:

  • What’s the biggest and most exciting goal you can dream up?
  • If that was your primary goal, what other goals stop being relevant?
  • What people or person could the bigger goal attract that would make it achieving it easier?

2. A Meaningful Past

Being a founder can sometimes feel like a full-contact sport. You can get hurt, through disappointment, bad luck, and even betrayal. That’s why painful events in the past need to be treated like a wound.

When we don’t process the past, unhelpful stories we tell ourselves to protect our ego can cause havoc in the present.

Treating the past means framing every single thing that happened in two ways:

  • A win: an accomplishment that we can celebrate.
  • A lesson: a failure that we learn from, that we can celebrate.

We leave everything else behind. If, for some reason, we can’t let something go, it means we haven’t learned something important from it. As my mentor used to tell me: failures will be repeated until learned.

This work can be done separately, but it’s even more powerful to do it in the context of a big goal. This way, the wins and lessons can be aligned to the vision that truly excites us.

Questions to work through:

  • What is the meaning of what you’ve been through?
  • How did those experiences serve you?
  • Where are they failing to serve you today?

3. A Meaningful Present

Here’s the thing: the future and the past don’t physically exist. They’re tools to help us act in the present.

Often, clarifying the meaning of a bigger future and a happier past makes changing the present obvious and necessary.

As founders, it’s easy to be driven entirely by the past: old goals, old activities, old habits. This stops us from growing. And a lack of growth is one of the fastest paths to feeling meaningless.

Most founders I work with don’t need to do more. They need the courage to do less.

Growth often requires us to:

  • Start doing something we haven’t done before
  • Stop doing something we’ve already mastered
  • Double down on getting even better at some things

The meaningful present is about making these changes — aligning how you spend your time with the future you’ve defined and the lessons you’ve drawn from the past.

Questions to work through:

  • What is the biggest bottleneck to making the big goal viable?
  • What do you need to stop doing—even if there’s a cost involved?
  • What do you need to delegate?

Happiness Isn’t Always Happy

A meaningful life isn’t always smiles and rainbows. It comes with difficulty, sacrifice, and discomfort. But it’s the thing that keeps you going when pleasure and engagement can’t.

If you’re a founder questioning what it all means, the answer isn’t to push harder or to quit. It’s to invest time in making meaning.

Start with the future. Let it reshape the past. And then rebuild the present around what actually matters.

Related Reading: 

 

Originally published on March 11th, 2026

 

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