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Frequently Asked Questions

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Get product information, view tips, get the help you need, and more. Connect with our team to get service & support from Biomag.

Top 5 Questions


1. Will it work for me?

These are a range of conditions that some of our customers have had relief from: arthritis (osteo and rheumatoid), back, neck, hip, shoulder and limb aches and pains, cramps, fatigue, fibromyalgia, sciatica, sleepless nights, and stress.

We are proud to tell you that 95% of our customers have received benefits and their sleep has improved. Many customers find their pain disappears completely, while others say the pain has eased to a level where they feel a marked improvement in their quality of life.

Despite the myriad of success stories we get here at BioMag, occasionally a customer may not be fully satisfied with the level of pain relief they get from their BioMag. That’s why we offer a 60-day money-back satisfaction guarantee – and we can only do that because we are so confident that our mattress toppers will help.

2. How long does it take to work?

This depends on the individual. Often, it takes a couple of weeks, although some people have told us they noted relief from their pain on the first night! But most take longer, so it’s important to persevere. And it can sneak up on you: other customers have told us they didn’t notice the benefit, until they took the BioMag off the bed, or slept in a bed without one, and noticed their pain was worse.

You may find that your body temperature may be raised slightly when you first put the BioMag on your bed, this is normal, and will be only temporary. Remember, 95 percent of users of BioMag products love them.

3. Is it compatible with my electric blanket?

Yes, your BioMag underlay simply fits over the top. The simplest way to remember is: there should only be a sheet between you and your BioMag. Occasionally, an electric blanket directly beneath an underlay can cause it to move. If this happens, a thin blanket placed between them will stop it.

4. Are there any side effects?

The World Health Organisation has concluded that no adverse side effects have been observed with the magnetic energy that BioMag products use. However, you should drink more water for the first couple of weeks, as it may make you thirsty.

5. Are magnetic underlays safe for everyone?

If you are pregnant, have a pacemaker, or sleep with an insulin pump it is not recommended that you sleep on magnetic products. There has never been any evidence that magnetic therapy is harmful for pregnant women, but we prefer to err on the side of caution.

With pacemakers and insulin pumps, it is possible that the magnets could slow down the battery. People in these categories should instead be buying one of our beautiful Fleece products which do not contain magnets.

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BioMag Care

Care Of Your BioMag

It’s easier than you might think! The simplest way to look after it is to air it regularly in the sun, and gently vacuum it to get rid of dead skin cells etc, and to reinvigorate the wool. It’s also a good idea to occasionally comb it with a long-toothed comb.

It can be spot-cleaned using mild soap and warm water, and then dried in the sun.

If you are determined to wash the whole thing, you can - but not at home, because they’re too bulky for your domestic washer. It should be gently washed in a commercial washing machine using a mild detergent and warm water, and it shouldn’t cost more than about $35 for a King Size. Remember, temperature is critical. DO NOT exceed 104 degrees Fahrenheit.

Use conditioner in the final rinse cycle. Tell the laundry people to tumble dry on cool setting only for about 20 minutes, then hang it in the drying room for a couple of days until it’s dry. DO NOT overdry – the moisture level of wool must not be less than 10%, otherwise it can become dry and brittle.

But most people don’t bother getting their underlay washed, and as long as you air it out regularly there’s usually no need.

Dry Cleaning your Biomag

Before leaving your BioMag with a dry cleaners, make sure they understand how to clean a magnetic underlay.

Care over time

To ensure many years of satisfaction from your Biomag, make sure you keep it in good condition. Every few months, gently vacuum it to get rid of the dead skins cells etc. Occasionally put it outside in the shade, to air it out. You can also gently comb the wool to lift the fibres.

Can you use a Biomag wool underlay if you have a Water Bed?

Yes you can – excellent in fact for waterbeds, only thing need to check the size.

Is there a half-and-half magnetic underlay?

We have the perfect solution for couples where one partner wants a magnetic mattress pad, and the other partner prefers wool without the magnets: the 50/50 underlay.

This is a BioMag on one half, and a plain double fleece on the other. Ideal for situations where one partner may need relief from pain that requires the BioMag magnets, while the other partner may prefer plain wool. And it doesn’t matter which side of the bed you sleep on – the 50/50 BioMag can be turned around to be used either way.

We are delighted to make these to order, just call our service centre staff.

Can I put a single underlay on a bigger bed?

It’s not ideal, because a small underlay on a big bed is likely to move and wrinkle.

It’s best to get the correct size – that’s why we have a BioMag underlay for every size of mattress, from Single right through to California King.

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Do you provide a time payment option and if so how do go about making an order using this option please?

Yes we do, you can learn about our financing options here. Or simply contact our customer service team on toll free 0508 24 66 24 or send us an email to get support.

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About Wool

What are the benefits of using Wool?

Here in New Zealand we tend to take wool for granted because it’s everywhere. There are 40 million sheep in a country with only four and a half million people, and we wear a lot of woollen clothing. But stop for a minute to think about the superb qualities of wool:

  • A wool underlay will keep you warm in winter – and yet cool in summer. This is because wool fibres create a sort of microclimate, trapping microscopic pockets of air. This is what keeps you warm, when you’re on a quality product such as a BioMag. And yet those same fibres have amazing moisture-wicking properties, which helps to keep you cooler and less sweaty in summer.
  • The fibres of wool allow moisture to pass through without the wool itself becoming damp. That’s why BioMags and our pillows are healthier – mould and mildew will not form in dry conditions.
  • Similarly, dust mites don’t like wool because it doesn’t provide the damp environment they need to thrive. Dust mites are the reason that people who are prone to asthma sometimes find other bedding gives them problems.
  • Wool is good value for money! Your BioMag product will last you for years and years – we’ve been selling underlays for 35 years, so we know how long they last. They might cost a bit more upfront, but an underlay that lasts you for a good 20 years, works out as very good value!
  • And the single best feature of a underlay: comfort! The luxurious thick pile naturally cushions your body, reducing the load on pressure points such as your hips and shoulders. This is particularly beneficial if you suffer from arthritis etc, and it’s why you’ll get such a good night’s sleep.

A study conducted on wool and sleep patterns at Monash University in Australia found that the amount of movement during a normal night's sleep is less, in comparison to the same people sleeping without wool on the bed – again, helping give a better night's sleep.

Why choose a Biomag woollen underlay over any other product on the market?

The Biomag underlay was developed 35 years ago, and is a proudly New Zealand made product. We’ve developed a special blend of merino and downs wool for maximum support and comfort, with durability and performance, because merino wool alone does not have the durability and strength of downs wool. Plus, not only is our wool grown in New Zealand and Australia - but just as importantly, it’s processed here as well.

All our wool is fleece – the best wool - from the sheep's back, not the skirting wool from the belly, or dirty wool that’s been bleached. And the wool used in a BioMag has ONLY been washed or scoured, it has not been treated with chemicals.

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About Magnets

What sort of magnets are used in BioMag underlays?

We use unidirectional ferrite magnets, with the North, or Negative, pole on the side facing your body. We offer a lifetime guarantee – the strength of the magnets will not noticeably diminish during your lifetime.

Can magnets interfere with credit cards etc?

The strip on the back of an EFTPOS card, swipe card or credit card, contains your account information. Any prolonged, close-proximity contact with a magnetic field can interfere with the magnetized strip, and can wipe the data. For this reason, if you have a magnetic titanium bracelet, you should avoid it being in close contact with magnetised cards - for instance in your handbag. You should also avoid wearing it on the wrist next to your watch. Similarly, you may like to take your watch off before you get into bed, as the magnets in any magnetic underlay can slow the battery.

Do the magnets effect a phone or laptop left on the bed. Or even a remote?

Yes - Due to the magnetic field, this will cause the battery life to slow down or even stop.

How are the magnets attached?

The ceramic magnets used in a BioMag are glued into place, and then sewn around, so they can’t shift (this is why all our products are washable). The magnets are sewn into the underlay in a pattern that ensures the maximum amount of your body is in close contact, maximizing performance.

Millions of people around the world have benefited their wellbeing from using magnetic therapy. Put simply, the magnets may reduce inflammation that causes pain. South East Asia are great users of magnetic therapy in the same manner as acupuncture.

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Free Delivery to your door

All BioMag Underlay and WoolBliss Underlays are delivered Free to your door.

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60 Day Money Back Guarantee

We stand by our products backed by our 60-Day Money Back Guarantee on all Magnetic Underlays.

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Freephone: 0508 24 66 24

Call us if you have any questions, we are here to assist you.

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