The Whoop Medical Grade (MG) launched in May 2025 alongside the Whoop 5.0. It adds ECG-based atrial fibrillation detection and irregular-rhythm notifications to the standard Whoop feature set, making it the most medically serious wearable in the Whoop lineup. That medical-grade hardware demands an equally-engineered strap. This article walks you through what makes a band MG-ready, what to avoid, and which bands work for both Whoop 5.0 and MG.
Whoop MG vs Whoop 5.0: What's Different?
MG shares the 5.0's exact chassis and clasp system. The two devices use the same pod dimensions, the same battery, the same sensors — except MG adds an ECG electrode on the bottom of the pod. The strap must hold the pod flush against the skin so the ECG electrode can read your heartbeat through your wrist. A loose strap breaks ECG accuracy and may cause the MG to miss rhythm events.
What Makes a Band MG-Compatible?
- Exact Fast Link fit — The clasp must click firmly into the MG pod's notch. Loose straps produce false-negative ECG readings.
- Skin-safe silicone — For MG users who wear the device 24/7, hypoallergenic, PMU-free silicone reduces the chance of contact dermatitis from constant wear.
- Waterproof to 50 m — ECG patches need to stay sealed against sweat and water. A waterproof strap is essential.
- Low-profile buckle — Bulky buckles lift the pod away from the skin, breaking the ECG contact patch. Look for a low-profile clasp that sits flush.
Can a Whoop 5.0 Band Fit the MG?
Yes — this is the key insight. Any band engineered for Whoop 5.0 fits the MG exactly. The chassis, the clasp notch, the sensor placement — all identical. If you find a band labeled "Whoop 5.0 / MG compatible," you can use it on either device. See our LDFAS Silicone Sport Band, which explicitly fits both 5.0 and MG.
Choosing the Right Band for Medical Monitoring
MG users wear the device overnight to catch AFib events during sleep. That means the band needs to be:
- Comfortable enough to sleep in — soft-touch silicone with no hard edges that dig into the wrist during REM cycles.
- Secure enough to stay on all night — the buckle should not loosen during tossing and turning.
- Breathable to prevent sweat build-up — perforations or channels reduce moisture that can degrade the ECG contact.
Recommended: LDFAS Silicone Sport Band for Whoop MG
The LDFAS Silicone Sport Band is engineered to fit both Whoop 5.0 and Whoop Medical Grade (MG) with the same Fast Link clasp. Features:
- PMU-free, latex-free, hypoallergenic food-grade silicone
- 8-row perforated inner lining for airflow
- 50 m waterproof — safe for shower, pool, surface water
- Low-profile buckle that keeps the MG ECG electrode flush against the skin
- 2-year LDFAS replacement promise — if the band stretches, cracks, or loses shape, we replace it free
Priced at $19.99 with free shipping. Browse our full Whoop band collection.
Care Tips for MG Bands
ECG accuracy depends on a clean contact patch. Replace your band more frequently than a casual wearer would — every 2–3 months if you wear MG 24/7. Wipe the band weekly with isopropyl alcohol (70%) to remove body oils that can degrade the ECG signal. If you develop redness where the pod sits, swap to a fresh band immediately and let your wrist rest for a day.
One Band, Two Devices
If you own both a Whoop 5.0 and an MG — for example, using 5.0 for daily training and MG for medical monitoring — you can use the same band on both. The clasp is identical. Just slide the band between pods as needed.
Frequently Asked Questions
Q: Does the Whoop MG need a special band?
A: No. MG uses the same Fast Link clasp as Whoop 5.0. Any band engineered for 5.0 will fit MG exactly.
Q: Will a loose band break ECG accuracy?
A: Yes. The MG ECG electrode must sit flush against the skin. A loose band lets the pod lift, producing false readings or missed AFib events.
Q: How long should an MG band last?
A: Replace every 2–3 months for 24/7 MG wearers. Less-frequent wearers can stretch to 6 months. Replace sooner if the band stretches, develops odor, or shows visible wear.
Q: Is silicone safe for 24/7 wear?
A: Yes, when the silicone is PMU-free and latex-free. Look for medical-grade or food-grade silicone. Avoid bands that smell strongly of plastic when new — that indicates cheap material.
Q: Can I use a metal band with the MG?
A: Metal bands work but add weight, which can pull the pod away from the skin during sleep. For 24/7 MG wear, a soft silicone band is the better choice. Save metal for daytime or social wear.
Q: Where can I buy a band for Whoop MG?
A: Browse the LDFAS Whoop 5.0 & MG band collection. Every band fits both devices.