- Standard snaps 45 mm apart: fits Frontier X, X2, X3 and most snap-on monitors
- Soft nylon-spandex, comfortable for 15+ hours
- Moisture-wicking fabric
Color: Black
Choose your size to add it to your cart.
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- Delivered in 3–5 business days
- Three sizes, 20 to 56 inches
- Check the compatibility
Product Details
- Adjustable 24"–40"; stretches to 61"
- Standard snap electrodes, 45 mm apart.
- Soft nylon-spandex strap, comfortable for 15+ hours.
- Breathable & Moisture-Wicking – Keeps you cool, dry, and comfortable during training.
- Durable & Washable Electrodes – Waterproof, sweat-resistant HRM electrodes built for everyday use.
- Accurate ECG Tracking – Reliable ECG-based heart rate monitoring for any workout.
Compatibility
- Compatible: Frontier X, X2, X3 and most Garmin HRM monitors, Wahoo Tickr (1st & 2nd Gen), Polar (H7 & older), Mo-Fit, Powr Labs, Coospo.
- Non-compatible: Monitors with recessed snaps: Polar H9 and H10, Garmin HRM 600, Garmin HRM-Tri, Wahoo Tickr (3rd gen, 2020), MyZone, Peloton.
Material and Care
Material: 80% Nylon, 20% Spandex
Unclip the monitor first. Hand-wash the strap with mild soap and water. Don't wash or submerge the monitor.
Delivery and Returns
- Delivery in 3-5 business days
- Non-replaceable and Non-returnable
If you're not sure it fits your monitor, email support@fourthfrontier.com before you order.
As featured in
One strap for every kind of training
Soft, stretchy and sweat-proof, with standard snaps that fit your Frontier monitor and most others.
- 45 mmstandard snap spacing
- 20–56 inacross three sizes
- 15+ hrscomfortable wear
Simple, and built to last
Tap a point to see what each part does.
- 1Snaps 45 mm apart
The standard spacing used by Frontier X, X2, X3 and most snap-on monitors.
- 2Electrode pads
Textured pads sit against your skin and carry the signal to your monitor.
- 3Soft nylon-spandex
Breathable and moisture-wicking, comfortable for 15+ hours.
- 4Adjustable length
Slide to fit. Small, Medium and Large cover 20 to 56 inches.
- 5Quick-connect clasp
Clips shut in one move and stays closed when you sprint.
Made for long, sweaty sessions
Any sport
Running, cycling, swimming, boxing or the gym.
Sweat-proof
Sweat-resistant electrodes made for everyday training, indoors and out.
Soft and stretchy
Moves with you when you breathe hard, without digging in.
Quick-connect clasp
Clip it shut and adjust the fit in seconds.
Works with the monitor you already own
If your heart rate monitor clips onto two standard snaps 45 mm apart, it fits this strap.
Works with
- Frontier X, X2 and X3
- Most Garmin HRM monitors,
- Wahoo Tickr (1st and 2nd-gen),
- Polar H7 and older,
- Coospo, Mo-Fit, Powr Labs
Doesn't fit
- Polar H9 and H10,
- Garmin HRM-600 and HRM-Tri,
- Wahoo Tickr, 3rd gen (2020),
- MyZone, Peloton
Pick a size, Snap on, Train
- 1Pick your size
Three sizes, 20 to 56 inches.
- 2Snap on your monitor
Press it onto the two snaps on the band.
- 3Train as usual
Wear it just below the chest muscles.
Size guide
| Size | Adjusts to fit | Stock |
|---|---|---|
| Small | 20–28 in51–71 cm | Black |
| Medium | 25–40 in64–102 cm | Black, Orange |
| Large | 33–56 in84–142 cm | Black |
How to measure
- 1. Wrap the tape around your chest just below the chest muscles.
- 2. Keep it level and snug, then read the number.
- 3. Pick a size whose range covers it. If ranges overlap, either will do.
Questions about fit? Email support@fourthfrontier.com before you order.
The details
(Heart rate monitor not included)
| Specification | HRM Chest Strap |
|---|---|
| Material | 80% nylon, 20% spandex |
| Electrodes | Two snap electrodes, 45 mm apart |
| Sizes | Small 20–28 in · Medium 25–40 in · Large 33–56 in (chest) |
| Colors | Black, Orange. Blue and Red are sold out. |
| Works with | Frontier X, X2, X3 and most monitors with 45 mm snaps |
| Care | Unclip the monitor, hand wash the strap with mild soap |
| Delivery | 3–5 business days |
| Returns | Non-replaceable and Non-returnable |
“Over a year of use and I haven't noticed any wear or tear.”
“I've been using this chest strap for over a year now, and I haven't noticed any wear or tear. I'm seriously impressed with how durable the fabric is.”
“It's super comfy and feels really nice to wear. I love how easy it is to adjust, and it fits perfectly.”
“It's really comfortable, fits perfectly, and tracks my heart rate like a pro. And the best part? It's budget-friendly.”
“It's super soft and feels great on the skin. Even during sweaty workouts, it doesn't irritate at all.”
Two ways to wear your monitor
HRM Chest Strap
HRM Sports BraComplete your kit
Total for
Explore Frontier X3
Questions, answered
What is an HRM chest strap?
An HRM chest strap is a strap worn around the chest to monitor heart rate during physical activity.
Why should I use an HRM chest strap?
It provides accurate real-time heart rate data, helping you optimize workouts, monitor intensity levels, and track fitness progress more effectively.
Is an HRM chest strap accurate?
Yes, HRM chest straps are known for their high accuracy compared to wrist-based heart rate monitors, especially during vigorous exercise.
Can I use an HRM chest strap with my smartphone or fitness watch?
Yes, the HRM chest straps are compatible with popular fitness apps and devices that support BLE 5.0 or ANT+ connectivity.
Can an HRM chest strap help improve fitness performance?
Yes, by monitoring heart rate zones, an HRM chest strap helps you train more effectively, ensuring you stay within optimal intensity levels for your goals.
Are HRM chest straps waterproof?
Yes, The HRM chest straps are water-resistant or waterproof, but check the product specifications for specific details.
How do I wear an HRM chest strap correctly?
Position the strap snugly just below the chest muscles, ensuring the sensor pads are in contact with the skin.
Does it come with a heart rate monitor?
No. This is the strap only. Clip on your own Frontier or snap-on monitor, or get Frontier X3
Which heart rate monitors does it work with?
Frontier X, X2 and X3, most Garmin HRM monitors, Wahoo Tickr (1st and 2nd gen), Polar H7 and older, Coospo, Mo-Fit, Powr Labs and other monitors with standard snaps 45 mm apart.
It doesn't fit monitors with recessed snaps: Polar H9 and H10, Garmin HRM 600, Garmin HRM-Tri, Wahoo Tickr (3rd gen, 2020), MyZone and Peloton.
Which size do I need?
Measure around your chest just below the chest muscles and check the size guide. Small fits 20–28 in, Medium 25–40 in and Large 33–56 in.
How do I wear it?
Sit the strap snugly just below your chest muscles, with the sensor pads touching your skin.
Can I return it?
No. The strap is a final sale and can't be returned or replaced, so please check your monitor and size first. Email support@fourthfrontier.com if you're unsure.
How do I clean it?
Unclip the monitor, then hand wash the strap with mild soap and water. Don't wash or submerge the monitor.
How long does delivery take?
Orders are delivered in 3–5 business days.
When will the other colors be back?
Blue and Red are sold out right now, and Orange is only available in Medium. Choose one in the buy box and leave your email to hear when it's back.
Ready for your next session?
- Delivered in 3–5 business days
- Fits Frontier devices & most snap-on monitors
- Choose your size and order now!