Yes — Medical Breakthrough is designed for the full Medical Saunas wellness ecosystem. It's water-resistant to 100 meters, so pools, showers, and recreational diving are all completely safe — chlorine and saltwater won't affect it. It's built to keep tracking through the temperature swing from a 37°F Frozen Cold Plunge to a 195°F Medical Sauna session — exactly the recovery routine our members run every day. Whether you're plunging, sweating, or somewhere in between, Medical Breakthrough keeps reading your signals so the app can tell you exactly what to do next.

Medical Breakthrough is waterproof to a depth of 100 meters and runs up to 10 days on a single charge. Every sensor — heart rate, glucose, HRV, SpO₂, sleep stages, temperature, stress, VO₂ max, women's cycle, and fitness activity — starts tracking the moment you put the ring on. The Medical Breakthrough Membership ($19/mo, first month free) adds the live AI coaching layer that turns your raw data into a specific plan for your day — what to do, when to do it, and how to recover.

Medical Breakthrough gives you a complete picture of your health, 24/7:

• Heart rate & HRV (heart rate variability)
• Blood oxygen (SpO₂)
• Glucose trends
• Sleep stages, quality, and regularity
• Body temperature trends
• Stress and mood
• VO₂ max & cardiovascular fitness
• Fitness activity, steps, and calories
• Women's health: cycle tracking, pregnancy mode

Yes — but the experience is much more limited. Without a membership, you'll still see your raw health data: heart rate, sleep, HRV, SpO₂, temperature, and the rest of your sensor readings. What you won't get is the part that actually changes your day: the Medical Breakthrough AI assistant that reads your nine live signals, factors in your medical sauna and cold plunge sessions, and tells you exactly what to do next — train, rest, hydrate, sauna, plunge, sleep. That's the whole reason most members buy Medical Breakthrough in the first place. Membership starts at $19/mo, your first month is free with every ring purchase, and you can cancel any time. Without it, you've got a beautiful titanium ring full of data and no one helping you act on it — most people decide that's not the version of Medical Breakthrough they want.

After you purchase your Medical Breakthrough ring, you can choose to receive a free sizing kit first. If you select that option at checkout, we'll ship the sizing kit to you before the ring — it includes plastic sizers for every available size. Wear the sizer that feels right for at least 24 hours (including while you sleep), then confirm your size with us, and your ring ships next. Fingers swell during exercise and shrink in the cold, so an all-day test gives you the most accurate fit. If you're between sizes, choose the smaller of the two for a more secure seal over the sensors. If you prefer to skip the sizing kit, your ring ships immediately in the size you select at checkout.

Every Medical Breakthrough ring ships in a premium gift box. Inside you'll find:

• 1 × Medical Breakthrough smart ring (your chosen finish and size)
• 1 × wireless charging case
• 1 × USB-C charging cable
• 1 × user manual

Paired and tracking in under three minutes. Ships in 3–5 business days with free shipping.

If you purchased your Medical Breakthrough product directly from the Medical Breakthrough online store, you can return or exchange your fully functional and undamaged Medical Breakthrough product for any reason within 30 days of receiving your original order. Returns should include all items from the original purchase — for Medical Breakthrough Ring sets, this means the ring, wireless charging case, and USB-C cable.