Horse blankets: understanding deniers and weight (choosing the right protection)
At Sellerie Bucéphale, two questions frequently come up in the blanket section: “What are deniers?” and “What weight for what temperature?” These are two distinct technical concepts, often confused in product sheets and stable discussions. This guide focuses on them: understanding what 600D, 1200D, or 1680D mean, what 100, 200, or 300 g cover, and how to combine the two according to use. If you want to sort through the main types (waterproof, stable, drying, quarter sheet), start with our guide “Drying, waterproof, or stable blanket: how to choose?”, then come back here for the technical details.
Denier (D): what is it and what is it for
The denier is a unit that describes the thickness of the thread used to weave the outer layer of the blanket (technically, the mass in grams of 9,000 meters of thread). In practice, what you need to remember is: the higher the denier number, the thicker, denser, and more tear- and abrasion-resistant the outer fabric is — against bites, brambles, rolling, rubbing against a fence or shelter.
These magnitudes are commonly found on outdoor blankets:
| Denier (indicative) | Durability of the outer layer | Horse profile / usage |
|---|---|---|
| 300D to 600D | Light to medium | Calm horse, moderate use, mid-season |
| 900D to 1200D | Sturdy | Regular pasture life, active horse |
| 1680D | Very sturdy | Playful horse / lives outdoors, harsh conditions, herd |
This is the most common confusion. A very durable 1680D fabric is not “more waterproof” than a 600D fabric. Waterproofness depends on something else entirely: the waterproof membrane and the thermosealed seams. A high denier protects against tears; it’s the membrane and seams that keep the horse dry. So a blanket can be very tough without being the most waterproof, and vice versa.
The waterproofness of a fabric is measured by a technical test called the water column (or hydrostatic head), expressed in millimeters: a column of water is applied to the fabric and the height at which water starts to penetrate is measured. As a general guideline for horse blankets: British standards set a minimum of 1500 mm for a fabric to be considered waterproof; moderate rain exerts about 1000 to 2000 mm of pressure, which explains why a fabric meeting the minimum standard may show its limits in heavy or prolonged rain; a well waterproof blanket for daily use usually ranges between 3000 and 5000 mm, and some high-end models exceed 10,000 mm. These are generic benchmarks in the equestrian textile industry, not values for our products: neither Horseware nor Back on Track publish specific water column figures on their sheets. For precise data on a given model, ask us and we will relay the manufacturer’s information.
Another useful reference: denier mainly concerns outdoor blankets, where the outer layer faces wear and tear. For a stable blanket, the outer fabric may also have a denier rating (for example, a 1000D Ripstop cover on a high-end stall model), but durability is less critical since the horse is sheltered.
Weight (g): it’s what provides warmth
The weight is expressed in g/m²: it is the amount of insulating filling per square meter (0, 100, 200, 300 g/m²…), and not the total weight of the rug. It determines the warmth provided: the higher the number, the more the rug insulates.
- 0 g (no filling): no added insulation. A 0 g outdoor rug serves to block rain and wind in mid-season without warming.
- 100 to 150 g: light insulation, for cool days.
- 200 g : Intermediate insulation, for established cold.
- 300 g and above (350, 400 g…): strong insulation, for severe cold or clipped and sensitive horses.
Weight and temperature: cautious guidelines
| Indicative weight | Temperature (reference) | General use |
|---|---|---|
| 0 g/m² | > 10–15 °C | Rain/windbreaker, no added warmth |
| ~100 to 150 g/m² | ≈ 5–10 °C | Cool, horse little or not clipped |
| ~200 g/m² | ≈ 0–5 °C | Established cold |
| ~300 g/m² and above | < 0 °C | Severe cold, clipped or sensitive horse |
The "right" weight depends on the horse (clipped or not, age, condition, weight), its shelter, the wind, and the humidity. A hardy, unclipped, and sheltered horse self-regulates and tolerates much lower temperatures than these guidelines. Conversely, a clipped and exposed horse will need more. When in doubt, it’s better to have several adjustable layers than a single very thick rug — and monitor the warmth under the rug (withers, shoulder): a horse sweating underneath cools down poorly as it dries.
A 300 g stable (filling only, sheltered) does not warm like a 300 g turnout (which also has a windproof membrane that limits heat loss). We compare the weight between two models of the same family, never between a stable rug and an outdoor rug.
Denier + weight: how to combine according to use
Once the two concepts are understood, the choice becomes logical: we combine the denier (depending on the horse's exposure and temperament) and the weight (depending on the temperature). Here are the most common cases.
In the pasture, mid-season (rainy but mild)
Look for rain/wind protection without warmth: a 0 g outdoor blanket, with a denier suited to the horse’s temperament (600–900D for a calm horse, 1200D and above for a playful horse or in a herd). The key here is the waterproof membrane, not the padding.
In the pasture, in winter
Combine a durable, waterproof outer shell (high denier + membrane) with padding proportional to the cold: 100 g for a mild winter, 200 g for settled cold, 300–400 g for severe cold or clipped horses. This is the domain of padded outdoor blankets.
In the stall / at the stable
The horse is sheltered: waterproofing is not necessary and denier is secondary. The weight is chosen primarily according to stable temperature and the horse’s sensitivity — from a simple unlined sheet for summer or transition to a well-insulated blanket for winter.
The case of wellness textiles (Back on Track)
Some blankets, like those from Back on Track, are not just about a classic denier/weight pair. They combine a durable outer shell (for example, a waterproof 1680D fabric) with a Welltex® fabric lining: according to the brand, this textile reflects long infrared radiation supposed to stimulate blood circulation. This claim is from the manufacturer and does not replace veterinary advice; avoid this type of fabric on acute inflammation, recent heat, or swelling. Note: a Back on Track blanket is therefore chosen not only for its weight but also for this claimed muscle comfort function.
Our blankets, displayed deniers and weights
Here is a selection of models whose specifications clearly indicate the denier and/or weight — useful for visualizing the scale. We focus here on Horseware (Amigo® and Rambo® ranges) and Back on Track.
Outdoor blankets: combined denier and weight
Label reading: "Amigo® 1200D 100g" = 1200 denier polyester outer (durable) + 100 g filling (light insulation). The Frost 1680D combines a 1680D fabric with a Welltex® lining: according to the brand, this textile reflects long infrared radiation meant to activate blood circulation — beyond just the weight.
Stable blanket: weight first
From the 0g sheet (transition, summer) to the well-insulated 400g (severe cold): the box range lets you adjust the weight without worrying about waterproofing. Selection current at the time of writing. Sizes, colors, and availability change: click each model for real-time stock status. Reminder: Horseware blankets (Amigo®, Rambo®) are ordered in feet/inches.
To browse the entire range and compare deniers and weights:
Not sure about the denier or weight for your horse?
We discuss it together, horse by horse, according to its life and your region.
FAQ
Is denier (600D, 1200D, 1680D) about waterproofing?
No. Denier measures the toughness of the outer fabric — its resistance to tearing and abrasion. The higher it is, the sturdier the cover. Waterproofing depends on the membrane (water column in mm) and the heat-sealed seams. A 1680D fabric is not "more waterproof" than a 600D one: it is more durable.
What is the "water column" of a blanket?
It is the technical measure of a fabric’s waterproofness, expressed in millimeters: a column of water is applied to the fabric and the height at which water starts to pass through is recorded (called the “hydrostatic head” test). As a general guideline in the equestrian industry: the minimum for a fabric to be called waterproof is around 1500 mm, good daily protection is usually between 3000 and 5000 mm, and high-end can exceed 10,000 mm. These are general orders of magnitude: our suppliers Horseware and Back on Track do not publish specific values by model on their sheets — ask us for precise info on a given product.
Is a higher denier always better?
Not necessarily. A high denier (1200D, 1680D) is useful for a playful horse, in a herd or living outside in harsh conditions. For a calm horse with moderate use, 600–900D is enough and lighter. Denier is chosen based on exposure and temperament, not “maximum.”
What temperature does the weight correspond to?
As indicative guidelines: 0 g above 10–15 °C (rain/windbreaker without warmth), 100–150 g around 5–10 °C, 200 g around 0–5 °C, 300 g and more below 0 °C. But these ranges depend on the horse (clipping, age, condition), its shelter, wind, and humidity: these are guidelines, not rules.
Can you compare the weight between a stable blanket and an outdoor one?
No. The weight is not comparable across categories. A 300 g stable blanket (filling only, sheltered) does not warm like a 300 g turnout blanket, which adds a windproof membrane limiting heat loss. Comparison is only valid within the same family.
How do you read a label like “1200D 200g”?
The first number is the denier (here 1200D): the toughness of the outer cover. The second is the weight (here 200 g): the insulating filling, thus the warmth. “1200D 200g” = durable cover + medium insulation for settled cold.
Is a Back on Track blanket chosen based on the weight?
Not just that. These blankets combine a cover (sometimes 1680D waterproof) with a Welltex® lining. According to the brand, this fabric reflects long infrared radiation that is supposed to activate blood circulation — a manufacturer’s claim that does not replace veterinary advice. They should be avoided on acute inflammation, recent heat, or swelling. So the choice includes this comfort feature, beyond the weight.
