Horse Rug Waterproof and Breathability Ratings.

Any rug advertised as waterproof is referring to the fabric used for the rug, rather than the whole product. No rug is ever 100% Waterproof. This is because rugs contain stitching, webbing & fastenings that can not always be tape seamed or heat sealed to prevent water penetration. Waterproof rugs are chemically treated to prevent water passing through the fibres while allowing air to pass in between the fibres. Heavy rain, combined with strong winds will also blow water under the edges of a rug and force water into places that would normally be dry in light rain.

The industry standard for measuring a fabric’s water permeability (or it’s waterproofing ) is to place a column of water on the fabric and increase the level of water on the fabric to find the point at which the water starts to penetrate the fabric. This column of water is then measured to give the fabric’s waterproof rating in mm. e.g. 1500mm. (1.5 meters). For a material to be rated as waterproof it has to pass a minimum Hydrostatic Head test of 1500MM.

All Caribu Synthetic Rugs and Combos are rated to at least 3000MM - more than twice the minimum requirements. Our Synthetic Rugs have a breath ability rating of at least 3000gr/m2/per24hrs.

Ideally you should always be prepared to change a rug that has been subjected to hours of moderate rain for a spare dry one, & dry off the original. While the rug may be keeping the rain out, at the same time the horse's perspiration can build up under the rug.

You will also find that water can wick in around the edges of the rug - this is often only obvious along the skirts. Its quite normal for the bottom area of the skirts to get wet – you usually only see it from the gusset back, as the water runs down the outside of the rug it pools on the bottom lip of the trim and finds its way into the rear lining of the rug where it can wick up the lower lining.

You will find most manufacturers use the two tone design in their waterproof rugs, apart from looking good, the tapped skirt seam prevents water from wicking up any further into the rug. The belly surcingles are also located on the lower skirt and water will try to find its way in via the reinforced stitching. Any water entry thru these areas usually reduces after the rug has been in the rain a few times as the thread and materials swell to fill the stitching holes.

You will also notice in lined donna rugs that the poly fill starts upwards from the taped seam, you wont find many quality rugs with poly fill below the taped seam for the reason that it will absorb water – and the skirt generally hangs below the horse rather than being up against their coat.

Ensure you allow your rug to dry thoroughly in a well ventilated area, this will increase its life and durability.

When washing your horse rug, detergents may damage the waterproofing treatment, therefore we recommend detergents and bleaches should not be used on rugs that have been waterproof treated. Hand wash in cold water is best.

Breathable - What does it mean?

For any turnout rug to keep your horse dry on the inside,  both the outer fabric and the lining should also be breathable - because even in cold conditions your horse will perspire and if a garment does not have sufficient breathability, the moisture (from perspiration) and difference in outside/inside air temperature, will build up as condensation on the inside of the rug. This is more common when using rain sheets.

Keep in mind that regardless of the rugs breathability rating - in wet conditions, it will be reduced to almost Zero - as water covers the rug's fabric pores. This can cause condensation to accumulate on the inside of the rug in certain conditions- this extra moisture on the inside may also give the illusion that the garment is letting water in from the outside, when in reality it is your horses perspiration or condensation from the difference in outer air temperature.

Most Turnout combos have a fill or lining of up to 300grams and this alleviates this problem, as it assist's the rug to breath and keeps the horses excess perspiration off the horse's coat. If you are using an unlined rain sheet in very humid & wet or cold conditions – you may need to use in conjunction with a light cotton under rug or similar with a good moisture wicking properties.  The horses perspiration needs to be transported away from their  skin.

Denier Fabrics can be made breathable via using ultra tough hi-tech fabrics which are then coated with a micro-porous formula making the fabric completely waterproof and yet fully breathable. This means that the outer fabric will protect your horse from the rain and elements while still allowing sweat or condensation produced by your horse's heat to escape through.

Ratings are expressed in the amount of moisture that will pass thru a fabric in a 24 hour period.

Caribu Rugs are rated with a minimum of 3000gr/m2/per24hrs.