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Garmin

Garmin Index Sleep Monitor Armband (L/XL)

010-03024-00

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£149.00
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In addition to our 30 day returns policy, all items purchased from 1st October 2026 can now be returned until 15th January 2027, terms apply.
In stock - FREE Chosen Weekday Delivery Upgrade to weekend delivery during checkout
Product Description

THE MOST COMFORTABLE SLEEP YOU’VE EVER TRACKED

For a more comprehensive view of your fitness and recovery, the Index Sleep Monitor is the lightweight smart band that tracks your sleep while maximising comfort.

COMFORTABLE, BREATHABLE DESIGN WORN ON THE UPPER ARM

UP TO 7 NIGHTS OF BATTERY LIFE

SLEEP TRACKING AND RECOVERY METRICS

BREATHING VARIATIONS THROUGHOUT THE NIGHT

SKIN TEMPERATURE TRACKING FOR PAST OVULATION ESTIMATES AND MORE

MACHINE-WASHABLE BAND FOR EASY CLEANING

WHAT YOU'LL LOVE

SLEEP TRACKING

How did you sleep? The Index Sleep Monitor gives you insight with sleep score, sleep stages, HRV status and more, so you can better understand how well you recovered.

COMFORTABLE DESIGN

Worn on the upper arm, this lightweight and breathable smart sleep band comes in two sizes, allowing you to get the data you need without compromising comfort.

SEAMLESS DATA SYNCING

The Index Sleep Monitor seamlessly syncs your data with the Garmin Connect™ smartphone app. If you wear a compatible Garmin smartwatch during the day or a heart rate monitor during workouts, your data will seamlessly sync via Garmin Connect for more insight into your health and fitness.

BREATHING VARIATIONS

For a closer glimpse of your health, the breathing variations feature uses Pulse Ox to help you better understand shifts in your breathing patterns as you sleep.

SLEEP DATA INTEGRATION

Don’t wear your compatible smartwatch to bed? The Index Sleep Monitor can help fill in the gaps. It provides the sleep data needed for a more complete picture of your training metrics, including training readiness, recovery time and more.

WOMEN’S HEALTH

Using skin temperature, get more insight into your menstrual cycle, including better period predictions and past ovulation estimates. Track your menstrual cycle or pregnancy plus get exercise and nutrition education in the Garmin Connect app.

BETTER SLEEP, BETTER RECOVERY

HEART RATE

The Index Sleep Monitor continuously samples your heart rate throughout the night to provide your resting heart rate.

HRV STATUS

Gain a deeper understanding of your overall health through heart rate variability while you sleep.

SMART WAKE ALARM

Wake up more refreshed. The smart wake alarm gently vibrates to wake you at the optimal time.

SKIN TEMPERATURE

See how your average skin temperature changes, which can be related to your recent activity, sleep environment, potential illness and more.

PULSE OX SENSOR

Track your blood oxygen saturation while you’re asleep.

BODY BATTERY™ ENERGY MONITORING

See your energy levels so you’ll know when your body is charged or needs more rest. If you wear a compatible smartwatch while awake, get a more complete picture of your energy levels — night and day.

STRESS TRACKING

Find out if you’re having calm, balanced or stressful sleep.

RESPIRATION

See how you’re breathing throughout the night.

MACHINE WASHABLE

Cleaning the monitor is simple. Just remove the module, and toss the band into the washing machine.

What You'll Love

Sleep Score and Insights

Yes
General
Strap material

Soft, stretchy, breathable mix. 70% Nylon, 30% Spandex

Case material Plastic
Physical size

Module: 41.7 x 37.6 x 7.8 mm (1.6″ x1.5″ x 0.3″)
Sleep band L-XL: 452 x 63.5 x 0.55 mm (17.8″ x 2.5″ x 0.02″)

Weight

Module: 14.5 g (0.5 oz)
Sleep band L-XL: 20 g (0.7 oz)

Battery life

7 nights with SPO2 during typical usage (8 hours of sleep)

Health & Wellness Monitoring
Resting heart rate Yes
Heart rate Yes
Respiration Rate Yes

Body Battery™ Energy Monitor

Yes
Sleep  
Women's Health Yes

Past ovulation estimates

Yes
Skin temperature Yes
Sensors

Pulse Ox Blood Oxygen Saturation Monitor

Yes
Accelerometer Yes (for sleep)
Daily Smart Features
Connectivity

BLE (BLUETOOTH Low Energy 5.0)

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Product Specifications
Gift For / Occasion
Valentine's Day
Strap Material
Nylon
Case Material
Plastic
Strap Colour
Black
Accessories
Other Accessory
Delivery & Returns
Free delivery is available on all UK orders - click for information about delivery methods & international pricing
For items listed as in stock, your order should be completed before 4:00pm (Monday-Friday) for us to despatch the same day or before 11:30am on Saturday for delivery Monday. Please note that all orders must pass our security policy before they are despatched and we must be able to take payment successfully, if this is not possible we will email or send an SMS with further instructions. For queries and delivery questions please feel free to call us on 01926 298499.
For other items, a delivery estimate will be shown where possible. If we feel we are unable to adhere to the timescale after you place your order we will contact you to make you aware and allow you to change your order if necessary. Items will be sent by your chosen delivery method once they are back in stock. For UK orders paid by card, Apple Pay or Google Pay we do not charge you until we are about to despatch your order; PayPal, Amazon Pay, Klarna, finance and international orders are charged when the order is placed.
Click & Collect from a local Post Office
We now offer Click and Collect to over 10,000 UK Post Offices. Simply select the option during checkout and enter your postcode to find your closest Post Office. We will send the package using Royal Mail Tracked or Special Delivery (next day) and once your package is ready to collect an email will be sent from Royal Mail (proof of ID will be required). Please note it is not possible to use PayPal or Amazon checkout with this delivery option.
Returns Policy

In addition to our 30 day returns policy, all items purchased from 1st October 2026 can now be returned until 15th January 2027, terms apply.

We aim for you to be absolutely delighted with your purchase and therefore offer you 30 days to change your mind on your purchase. You may do this by using the form provided with your order or otherwise. We will provide a refund of all payment received (not including delivery upgrades), usually within 2 working days of receiving your return (it may take a little longer during busy periods or for more complex returns). This will be made to the original payment method. For most payment methods it will take 3-5 working days for this to show on your statement.

Please ensure items from your order are suitable before wearing as we are unable to accept items which have been worn under our returns policy.

Returns are free on all UK orders. For orders under £500, you may generate a free tracked and insured returns label on the Royal Mail website (opens in a new window). You can print this label and send it back at any local Post Office at no cost to yourself. It is also possible to have the label printed at Post Office using the QR code from the confirmation email. Please retain the proof of postage receipt. Unfortunately we are unable to refund return postage for orders under £500 sent back by other methods, so we recommend printing the free postage label provided. For orders from £500 to £2,500, the Royal Mail label does not cover the value of the item, so please send it back by Royal Mail Special Delivery, insured for its full value, and we will reimburse the postage separately (please keep your proof of postage — full details are on your receipt), or contact us and we can arrange a collection. For orders over £2,500, please contact us and we will arrange the return for you. For international returns, you will need to bear the cost of returns postage. Please ensure the watch is returned to us in an unworn, new condition with all the original packaging (manufacturer's manual and guarantee if applicable). Please ensure items from your order are suitable before wearing as we are unable to accept items which have been worn under our returns policy. We reserve the right to make deductions for unnecessary damage caused to the product by yourself.

For UK orders we are also able to offer an exchange to a different product if required, please specify this when returning your product. For international orders, please return the item for a refund and place a new order for the product you would like.

If a fault develops with a watch that is outside of the 30 day returns period or is no longer in a new condition the watch can be returned to the manufacturer under the terms of the guarantee (we are an official UK dealer for all brands on our website) so that they can rectify any issues. For more information please see our returns policy page.

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