Saddle pads: half pads, risers, and the marketing in between
Half the saddle pad aisle solves problems you don't have. Here's what each type is actually for, and when a pad is the wrong fix for a saddle that just doesn't fit.

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The saddle pad aisle is where good intentions go to overspend. Memory foam, gel inserts, sheepskin, "shock-absorbing" everything — most of it is sold to people trying to pad their way out of a fit problem. Let's sort what each type does, and when reaching for a pad is the wrong move entirely.
A plain quilted cotton or fleece-lined pad has one job: keep sweat and grime off the underside of your saddle and provide a thin, breathable layer. For a saddle that already fits, that's all you need. The square dressage pad and the shaped close-contact (baby pad or all-purpose) pad are the everyday workhorses, and you don't need to spend forty dollars on one. SmartPak's everyday saddle pads cover the basics in every color a barn could want, and a stack of plain ones means you always have a clean, dry pad on hand.
A half pad sits between the saddle pad and the saddle and adds a layer of cushion or shock absorption — sheepskin, foam, or gel. A good sheepskin half pad, like the ones from Mattes, genuinely helps a horse with a sensitive back or a rider doing a lot of jumping, by spreading and softening contact. But here's the trap: a half pad cannot make a too-narrow saddle fit. If your saddle pinches, adding a half pad is like wearing thick socks to fix shoes that are too small — you've just made it tighter. The same goes if the horse is sore: confirm you've actually chosen an English saddle that clears his withers and sits level before you buy your way around the problem. Dover stocks the full sheepskin half pad range if your fitter has confirmed the saddle's right and the horse just wants a little more cushion.
A riser or shim pad is a corrective tool, not an everyday pad. It has pockets front and back where you insert foam wedges to lift a saddle that sits too low in front or behind — useful for a horse whose topline has changed, or for fine-tuning the balance of a saddle between fittings. The Thinline and the various shimmable half pads do this well, and Riding Warehouse keeps a solid shimmable correction pad selection. But a shim pad is a bridge to a proper fitting, not a permanent substitute. If you're constantly re-shimming, the saddle has outgrown the horse and it's time to call the fitter.
Material and care matter for the horse's skin. Cotton and natural fleece breathe; cheap synthetic linings trap heat and sweat and can cause girth itch and rubs on a horse worked hard in summer. Wash pads regularly — a crusted, salt-stiff pad is abrasive and is a common, overlooked cause of back soreness and white hairs at the wither. Keep two or three in rotation so one is always clean and dry. A jumbo bag of mild fragrance-free laundry detergent kept by the washer makes that routine painless.
A few quick rules. Match the pad to the saddle shape — a square dressage pad under a close-contact saddle looks sloppy and bunches under your leg. Pull the pad up into the gullet before you girth up so it isn't pressed flat across the spine, which is the single most common pad mistake we see and it's an easy one to fix. Don't double up thick pads thinking more is better; over-padding lifts the saddle off the horse's back and creates pressure points exactly where you didn't want them.
And remember the pad is one piece of a system that protects the horse from the gear you put on him. The same thinking that makes you choose breathable, well-fitted pads applies to the boots and leg protection you reach for next — the goal is always to add what the horse needs and nothing he doesn't. A good pad is quiet, clean, and forgettable. If you're thinking about your saddle pad while you ride, it's the wrong pad.