The90 Gem Smart Necklace Tracks Real-Time UV Exposure for Skin Health

Executive Briefing

• Monitors both UVA and UVB rays in real time, alerting users when to reapply sunscreen throughout the day.
• Links up to 90% of visible skin aging to cumulative UV exposure, including rays that penetrate windows indoors.
• Offers personalized thresholds and reminders via a companion app that factors in skin type and sunscreen habits.
• Features seven-day battery life, two-hour charge time, and splash resistance in a modular pendant design.
• Priced at $299 retail, with an early access discount dropping the cost to $199 through The90's website.