Checking the forecast, then checking your horse, then checking the forecast again: rugging in winter can feel like guesswork. Choosing the right horse rug weight is one of the questions we're asked most at this time of year, and the honest answer is that it depends on your horse rather than the thermometer alone.
In this guide, we'll explain what rug fill weights mean, how to match a rug to your horse and their routine, and how to check you've got it right so your horse can stay warm, dry and comfortable, without being overheated.
Contents
What Does Rug Weight Mean?
A rug's weight refers to the amount of insulation, or fill, inside it, measured in grams. The higher the number, the warmer the rug. Despite the figures, these numbers don't define how heavy the rug is for the horse or how it feels to carry, although a 200g rug will be a little bulkier than a 100g.
As a general guide:
- 0g (no fill): a waterproof shell that keeps off wind and rain without adding warmth or a light cotton sheet without any padding to keep a horse clean in the stable.
- 100g (lightweight): a little extra warmth without bulk
- 200g (mediumweight): noticeably warmer, for colder weather or horses who feel the chill
- 300g and above (heavyweight): for very cold conditions, fully clipped horses or those who struggle to keep warm
Masterclip turnout rugs and stable rugs both come in 100g and 200g, which covers most UK horses through autumn and winter, especially when combined with layering.
Start With Your Horse, Not the Weather Forecast
Two horses in the same field on the same night can need completely different rugs. Before you decide on a weight of rug, take these considerations into account:
- Clipped or full coat: a winter coat is excellent insulation. Once it's clipped off, your horse relies on you to replace that warmth, and the more you clip, the more they'll need. Our guide to horse clip types explains how much coat each clip removes.
- Breed and type: a hardy native or cob often copes with far less insulating rugs than a fine-coated Thoroughbred.
- Age and condition: older horses and those carrying less weight lose heat more easily. A good doer, on the other hand, may benefit from being slightly cooler.
- Shelter: horses generally cope well with cold, dry weather but its the wind and rain that really deplete body heat. A horse with access to a good field shelter may need less than one in an exposed paddock.
- Stabled or turned out: a horse in a stable is protected from the weather, so a stable rug might be lighter than a rug you would need for the field on the same night.
When to Use a Lightweight Rug
A 100g rug adds warmth without bulk, which makes it the most versatile weight in the tack room. It's ideal for:
- Autumn and spring, when temperatures change from one day to the next
- Milder UK winters
- A freshly clipped horse who needs a little warmth back straight away
- Horses who run warm, or hardy types with partial clips
- Layering under another rug when the weather turns colder.
The Masterclip 100g Post Clip Stable Rug is designed with clipped horses in mind. Its velvety faux fur lining helps keep a clipped coat gleaming and avoids rubs, and it works well as a layer under a heavier rug. For the field, the 100g Transitional Turnout Rug gives waterproof, breathable protection with a detachable neck cover for colder days.
When to Use a 200g Mediumweight Rug
A 200g rug is the step up for when winter properly arrives. It's the right choice for:
- Frosty nights and the colder months, roughly December to February
- Clipped horses once the weather has turned, particularly with a hunter or full clip
- Older horses, fine-coated breeds and those who feel the cold
- Horses who are losing condition and need to save energy
The 200g Stable Rug with Padded Neck keeps a horse cosy through winter nights indoors, while the 200g Transitional Turnout Rug adds mediumweight warmth in the field, with the same seamless 1200D waterproof outer and detachable neck cover as the 100g.
Turnout Rug or Stable Rug?
The weight is only half of the decision; the other half is where the rug will be worn.
Turnout rugs are made for the field. They need to be waterproof, breathable and tough enough to survive rolling, hedges and the occasional disagreement with a field companion. Masterclip turnouts use a seamless 1200 denier outer with no back seams, so there's nowhere for rain to sneak in, plus reflective binding all the way round for dark mornings.
Stable rugs are designed for indoors. They don't need to be waterproof, so they're softer and lighter to wear, and their job is to keep your horse warm without overheating in the stable.
Putting a stable rug on a horse who's going out in the rain will leave you with a soggy rug and a chilly horse, so it's worth having at least one of each through winter.
Stable Rugs Built for Individual Use and Layering:
"Can’t actually believe how great these rugs are. I brought the lightweight & stable rug and the fit and quality is better than any other expensive rug I’ve had over the years. "
A Quick Guide by Clip Type
Use this as a starting point for an average horse turned out in a UK winter, then adjust for your own horse. Hardy types may need a step lighter; fine-coated or older horses may need a step warmer.
The rug finder on our website will also suggest a weight based on the overnight temperature, whether your horse is in or out, and whether they're clipped.
Turnout Rugs with Detachable Neck Covers:
"I ordered the medium turnout rug and it's brilliant. It stays secure, good quality material with loads of ways to adjust. It's great as it means my horse doesn't have to be stabled so much as she's well protected from the elements especially with the detachable neck that you don't have to pay extra for."
Layering and the Neck Cover
You don't need a rug for every possible temperature. A few well-chosen weights, layered when needed, will see most horses through the winter.
- Layer a lightweight under a mediumweight: Our 100g post clip stable rug under a 200g rug gives you roughly 300g of warmth for the coldest nights, and you can remove the base layer as the weather eases.
- Use the neck cover: a clipped neck loses a lot of heat. Adding the detachable neck cover is one of the simplest ways to make a rug warmer without changing weight, and it keeps mud and rain off too.
- Check the fit of both layers: the underneath rug shouldn't wrinkle or slip, causing friction and rubbing.
If your horse comes in sweaty after exercise, walk them off and let them dry with a cooler if necessary before rugging up. Our winter horse care guide has more on cooling down safely in cold weather.
How to Check Your Horse Is Comfortable
The most reliable test is by checking with your hand. Slide it under the rug behind the shoulder and along the flank:
- Warm and dry: you've got it right.
- Damp, sweaty or hot: your horse is too warm. Drop down a weight or remove a layer.
- Cool to the touch, or shivering: add a layer or move up a weight.
It's worth checking your horse under thier rugs at different times of day, as a rug that's perfect on a frosty morning can be too warm by a sunny lunchtime. Over-rugging is just as much of a welfare issue as under-rugging: a horse who's too hot can sweat, become uncomfortable, and lose condition. In changeable weather when it just can’t make up its mind, a lighter rug plus a neck cover gives you an easy way to adjust your horse’s warmth as the temperature shifts.
Rug Weight Round Up
Choosing a rug weight comes down to your horse first and the weather second.
Think about how much coat they have, how they hold their condition, and where they'll spend the night.
For most UK horses, a 100g and a 200g, with a neck cover and the option to layer, will cover everything from the first clip of autumn to the hardest frost.
And if all else fails, your hand under the rug will tell you far more than any forecast.
Explore the full Masterclip horse rug range, all with free UK delivery. If you'd like help choosing the right rug or size for your horse, contact our friendly team and we'll be happy to help.
Products Featured In This Blog
Frequently Asked Questions
What are the best materials for durable horse rugs?
For a turnout rug, the outer fabric does most of the hard work. Look for a high denier outer, which tells you how thick and hard-wearing the yarn is: 600D suits quieter horses, while 1200D and above stands up far better to rolling, hedges and playful field companions. A waterproof, breathable coating keeps rain out while letting moisture escape, so your horse stays dry underneath.
Construction matters as much as fabric. A seamless outer with no back seam removes the most common place for leaks, and stainless steel hardware won't rust or seize after a wet winter. Inside, a smooth lining helps prevent rubs, and a soft faux fur lining, like the one in our post clip stable rug, is kind to a freshly clipped coat. Masterclip turnout rugs use a seamless 1200D Oxford weave outer, stainless steel fittings and 360° reflective binding.
What are the different types of horse rugs available?
The main types are:
- Turnout rugs: waterproof and breathable for horses living out, available in different fill weights, with or without a neck cover
- Stable rugs: warm, non-waterproof rugs for use indoors
- Under rugs and liners: thin layers worn beneath another rug to add warmth without buying a heavier rug
- Fleece and cooler rugs: for wicking away moisture after exercise or travelling
- Exercise sheets: for keeping a clipped horse's back and loins warm while riding
- Fly rugs: lightweight mesh rugs to protect against flies and sun in summer.
View our range of stable and turnout rugs here.
What are the top-rated turnout horse rugs available in the UK?
The best turnout rug for your horse is the one that fits well and suits how they live, but the highest rated turnouts tend to share the same features: a tough, high denier outer, reliable waterproofing that lasts beyond the first season, breathable fabric, shoulder gussets for freedom of movement, secure adjustable fastenings, and a choice of fill weights with a neck cover option.
Masterclip 100g and 200g Transitional Turnout Rugs were designed around exactly that list, and tested in real British weather. Masterclip is rated 4.9 out of 5 from more than 4,000 customer reviews, and every rug comes with free UK delivery and UK-based customer support.
How do I accurately measure my horse for a new rug?
UK rug sizes are measured in feet and inches, from the centre of your horse's chest, along their side, to tthe centre of the back of the hind leg. A soft tape measure and a helper make this much easier, and if your horse is between sizes, it's usually better to go up rather than down. Masterclip rugs come in sizes from 5'6" to 7'0".
For a step-by-step walkthrough, read our full guide to measuring your horse for a rug.
