A horse blanket — also called a rug in British equestrian tradition — is a fitted covering designed to keep a horse warm, dry, and protected from the elements or insects. The terms “blanket” and “rug” are often used interchangeably, though “rug” is the more common term in the UK and Ireland. Getting the right rug for the right conditions, in the right size, matters more than many horse owners initially appreciate.
Types of Horse Blanket
Turnout rugs are the workhorse of the rug collection. Waterproof, breathable, and built to withstand horses rolling, rubbing, and moving around in fields, they come in a range of fill weights — from lightweight (no fill, rain-sheet only) through medium (100–200g fill) to heavy (300–400g fill for deep winter). Choosing the right fill weight for the temperature is important; a horse that is too warm under too heavy a rug will sweat and lose condition, while an under-rugged horse will burn energy staying warm.
Stable rugs are used indoors and lack the waterproofing of turnout rugs. They are typically softer and lighter, providing warmth in a sheltered environment. Many yards use stable rugs overnight on clipped horses during winter to maintain condition and manage body temperature.
Cooler rugs are used immediately after exercise to wick sweat and moisture from the coat while preventing the horse from chilling as it dries. Wicking fabric technology — similar to modern athletic wear — draws moisture away from the skin and releases it through the outer layer. Never put a warm, wet horse directly into a stable under a heavy rug; the moisture needs to escape first. See the full cooling down guide for best practice.
Fly rugs (fly sheets) are lightweight mesh coverings used in summer to protect horses from flies, midges, and UV exposure. They are particularly important for horses sensitive to sweet itch — a severe allergic reaction to midge bites that causes intense itching and self-inflicted coat and skin damage.
Exercise rugs keep the horse’s back and hindquarters warm during winter riding, fitting behind the saddle and covering the quarters. Quarter sheets serve the same purpose in the warm-up phase of competition.
Rugging for Clipped Horses
Clipped horses require more rugging than unclipped horses because they’ve lost their natural insulation. The type of clip determines how much extra warmth is needed — a full clip removes all coat and requires the most rug coverage; a bib or trace clip removes far less and requires relatively little. Fitness training regimes in winter almost always involve some level of clipping, and understanding how to compensate with rugging is part of basic horse management.
Rug Fit and Sizing
A poorly fitting rug causes as many problems as no rug at all. Common issues include rub marks at the shoulders and withers (from a too-tight or incorrectly shaped neck opening), pressure across the back (from a too-narrow fit), and rugs slipping back (from insufficient leg straps or incorrect surcingle tension). Measure from the centre of the chest to the furthest point of the hindquarters in a straight line — this gives the standard rug size in the UK (typically expressed in feet and inches).
Frequently Asked Questions
Do horses need blankets in the UK?
Unclipped native breeds with thick winter coats often cope well without rugs in UK winters, particularly if they have access to field shelter and good forage. Clipped horses, older horses, those that are poor doers, and finer-skinned breeds like Thoroughbreds typically benefit from rugging. The decision should be based on the individual horse rather than a blanket rule — literally and figuratively.
How do I know what fill weight to choose?
A rough guide: no fill for rain protection above 10°C; 100g fill for 5–10°C; 200g for 0–5°C; 300g+ for below zero. Adjust for the individual horse’s condition score, clip level, and how they thermoregulate. A horse with good body condition and a natural coat needs significantly less rugging than a lean, fully clipped performance horse. When in doubt, err towards less rug and check regularly — you can always add a layer, but you cannot undo sweating and chilling that’s already happened.
How often should horse blankets be washed and reproofed?
At minimum, turnout rugs should be cleaned and re-waterproofed once per season — more often for horses in heavy turnout. Dirty, compressed fill loses insulating value; degraded waterproofing means a wet horse. Most equine laundry services offer wash and reproof as a combined service. Stable rugs and coolers should be washed as needed throughout the season.