Saddle Pad Thickness: How Much Is Too Much?

A saddle pad should be the thinnest one that still does its job. Thickness is a fit decision, not a comfort decision under a saddle that already fits, extra padding makes the saddle effectively narrower and creates new pressure points rather than cushioning old ones.

By the riders at Farris · Updated August 2026

Key takeaways

• More padding is not more comfort. The saddle tree is rigid, so padding changes fit rather than softening it.
• The back-pain risk threshold in the literature is mean pressure above 11 kPa (Nyikos et al. 2005)  not the ~4.7 kPa capillary figure that gets quoted in its place.
• A thick pad under a too-wide saddle can feel more stable while creating new pressure points.
• Padding cannot compensate for a saddle that does not fit. That finding is consistent across pressure-mat studies.
• If you are adding thickness to solve a problem, get the saddle checked first.

The intuition that gets horses sore

Thicker equals softer equals kinder. It is how padding works in almost every other context a thicker insole, a thicker mattress, a thicker cushion. Riders apply the same logic under a saddle and it goes wrong, because a saddle is not a shoe.

A shoe flexes around what you put inside it. A saddle tree does not. It is a rigid frame built to a particular width, and everything you place between it and the horse reduces the space that frame has to sit in. Add half an inch of pad under a saddle that fitted correctly and you have not softened it you have made it half an inch too narrow.

Riding Warehouse uses an analogy that captures it exactly: "If you have shoes that fit your feet perfectly with a thin pair of socks, wearing a thicker pair will make them tight and uncomfortable."

What the pressure research actually found

Most of what is known here comes from pressure-mat work, where a sensor mat with over two hundred individual sensors sits between saddle and horse and records force distribution while the horse is ridden.

Two numbers come up in that literature and they are routinely confused with each other.

Around 4.7 kPa is the mean capillary pressure in the tissue of the horse's back. Above that, blood flow through the capillaries can be occluded. That is a physiology figure it describes when circulation is interrupted, not when a saddle is doing harm.

Above 11 kPa mean, or 30 kPa maximum, is the threshold actually used to flag risk of inducing back pain. Those two figures were proposed by Nyikos et al. in 2005 and, per a review of pressure-mat studies of saddle fitting, remain the most widely used thresholds in the field.

The distinction matters because the lower figure gets quoted as though it were the damage threshold. It is not. Brief pressure above capillary pressure happens constantly in normal riding; sustained mean pressure above 11 kPa is the thing associated with back pain, and duration matters as much as peak.

What this means for pad choice is simpler than the numbers suggest: padding redistributes pressure, it does not remove it. A thick pad under a saddle that is already too wide may feel more stable, but it achieves that by moving pressure somewhere else rather than eliminating it.

The rule that follows

Use the thinnest pad that still absorbs sweat and protects your saddle. Add thickness only when you are solving a specific, identified problem, and only when a saddle fitter has confirmed that padding is the right tool for it.

A saddle-fit resource puts the underlying principle plainly: "a saddle pad cannot fix a poor saddle fit, but it can easily ruin a good one" and a thick pad under a correctly fitting saddle can make it too narrow, squeezing the muscles and constricting the gullet channel.

How to tell your pad is too thick

Four signs, roughly in order of how early you will notice them.

You cannot lift the pad into the gullet. Tack up, then try to pull the pad up into the channel at the withers. If there is no slack to lift, the pad is filling the space the horse's spine needs.

The saddle sits higher and feels perched. You notice it as a subtle loss of contact the horse feels further away than usual and the saddle rocks slightly at walk.

You are girthing tighter than you used to. A thick pad compresses under load, so the girth that was snug at mounting is loose ten minutes later, and the reflex is to over-tighten at the start.

Dry spots in the sweat pattern. After work, look at the sweat marks. Even dampness is what you want. A dry patch surrounded by wet is a place where pressure stopped circulation which is exactly the mechanism the capillary-occlusion figure describes.

When thickness is the right answer

There are real cases. A horse coming back into work after time off, with a topline that has dropped and will rebuild over a few months. A saddle that fits well but slightly wide, pending a professional re-flock. A horse with a genuinely flat back where the panel bridges.

In all of those, thickness is a bridge to a fix, not the fix. And in all of them it should be a half pad chosen for the purpose rather than simply a chunkier saddle pad a half pad can be shimmed and adjusted where a thick pad is uniform whether you want it to be or not.

Thickness and slipping are related

Riders often reach for a thicker pad when the real complaint is that the pad will not stay put. The two feel connected a thin pad seems flimsy, a thick one substantial but thickness makes slipping worse rather than better. More pad means more compression under the girth, which means more slack once the horse is warm.

If the pad moves, the answer is grip, not bulk. How to stop a saddle pad slipping covers what actually works.

Getting the other decisions right

Thickness is the last of four decisions, and it only makes sense once the first three are settled. Shape comes first, then size, then material and by the time you reach thickness, most of the work is done.

Browse saddle pads or go back to the English saddle pad buying guide.

A note on a statistic you may have read

A figure circulates widely online claiming that a thick pad under a well-fitting saddle raises pressure "by up to 30%." We went looking for the primary source and could not find it the page most often credited references Clayton's research qualitatively but publishes no such percentage. We have left it out. The documented figures are the ones above: ~4.7 kPa mean capillary pressure (when blood flow is occluded) and the Nyikos et al. 2005 thresholds of 11 kPa mean / 30 kPa maximum (when back-pain risk is flagged). Those two are different things and are frequently conflated including, in an earlier draft of this page, by us.

Sources

• Review of pressure mat studies of saddle fitting to the horse's back  Computer Methods in Biomechanics and Biomedical Engineering (2020), source of the Nyikos et al. 2005 thresholds
• Saddle Pad Pressure: Is It Harming Your Horse's Back?  Iberosattel
• How to Choose an English Half Pad  Riding Warehouse