What are the types of horse rugs? A quick guide

A turnout rug is worn outside in the field, waterproof and built to handle weather; a stable rug is the indoor equivalent, providing warmth without the waterproofing a turnout needs. A cooler goes on after exercise or a wash, wicking away moisture so a horse doesn't chill while drying off, and a fly rug is a lightweight mesh layer that keeps insects off in summer.

Most owners keep a small wardrobe of rugs and change them as the weather and season shift: a lighter turnout for autumn, a heavier one with more fill for deep winter. Getting the right rug on at the right time is as much a part of ownership as any other daily task. For the person who manages that wardrobe, see our gifts for horse owners, and for the daily jobs alongside it, read how to pick out a hoof.

Whether to rug at all

The harder question is not which rug exists but whether to put one on at all. The British Horse Society puts the threshold plainly: "Many horses stay comfortable without a rug until temperatures drop below 5°c." Below that, a horse has to burn energy making its own heat.

What the fill weights mean

Rug warmth is sold by the weight of its filling, and the BHS bands them as light weight 0g to 100g, medium weight 150g to 300g, and heavy weight 350g and above. Clipping changes the sum: a clipped horse has lost the coat it would otherwise use, while a horse with a bib or trace clip will often cope unrugged. Over-rugging is a real risk rather than a cautious one — the BHS warns that a rug flattens the coat so it becomes "less efficient at trapping heat", that it "prevents sunlight reaching your horse’s skin, limiting the production of vitamin D", and that over-rugging alongside overfeeding "may increase the risk of excess weight gain and laminitis".

The seasonal decision itself, month by month and clip by clip, is set out in when a horse needs a rug.

Written by Craig Fearn, Stable & Hoof. Last updated 2 September 2026.

Questions, answered

When should you put a rug on a horse?

The British Horse Society states that "many horses stay comfortable without a rug until temperatures drop below 5c". Below that a horse must produce more heat itself, so that is the point at which rugging starts to earn its place.

What rug should I put on my horse?

It depends on the weather, whether the horse is clipped, and whether it is stabled or turned out. Rugs are graded by fill weight: light is 0g to 100g, medium 150g to 300g, and heavy 350g and above.

Do horses need rugs?

Not automatically. An unclipped horse in good condition often does not, and the BHS warns that over-rugging flattens the coat, limits vitamin D production and can contribute to weight gain and laminitis.