Best Insoles for Running Shoes of 2026

A heel-to-toe cushioning upgrade does not have to be the most expensive experiment in your shoe. The Sof Sole Athlete uses PU foam and gel from heel to toe, and that even spread is what makes it feel more balanced than an insole that only props up the heel. In a daily trainer, it takes the sting out of the road without turning the shoe into a marshmallow.

What we appreciate most is the middle ground it strikes. It is softer than the Superfeet and more structured than a flat factory sockliner, and it settles into a running shoe without the break-in fuss of a rigid shell. The fit is the part to check: this is a substantial insole, so a snug racing shoe may feel crowded even though a roomier daily trainer has space to spare.

The 5.61-ounce weight is noticeable in hand next to the thinnest insoles here, but in a trainer it disappears; we noticed the cushioning more than the number. That is the trade we want at this price: a little more material underfoot in exchange for an easier everyday ride.

Women's running shoes often get a unisex insole stuffed into them; the Dr. Scholl's Run Active starts from a different place. The three-zone design puts cushioning under the heel and forefoot, and the reinforced arch is meant to smooth the landing-to-push-off transition. On easy runs, the shoe felt more planted without turning into a stability shoe.

The Polygiene StayFresh treatment is the detail we did not expect to care about, but it earns its place if you run back-to-back days or go sockless. It does not change the ride; it keeps the footbed from becoming the weak link between washes.

The fit needs a little patience. It is trim-to-fit, and the sizing runs small enough that you should start at the toe and check before cutting. The heel cup is the part you do not want to shorten. In the right shoe, it is a low-bulk way to get running-specific support.

Firm, planted support is the whole brief here. The Superfeet Women's High Impact uses a rigid shell and a supportive arch to give the foot a stable platform. We liked it most in high-impact sessions where a soft insole can feel like it is collapsing under the load.

What we appreciate is the women's-specific shape. It is easier to trim for a running shoe than a unisex slab, and it leaves less excess at the toe. The catch is cushioning: this is not a plush insert, and runners who want a soft step will find it abrupt. The firmness is the point, not a defect, but it narrows the audience.

The shoe pairing matters. In a cushioned daily trainer, the firm shell balances the soft midsole; in a minimal racing flat, it can feel like too much insole. We kept it for high-impact days and left it out of our lightest shoes.

An easy, low-cost way to rescue a gym shoe is a fresh insole, and the Dr. Scholl's Sport is the one we reach for. Its flexible side-to-side support is the reason it works across activities: it does not lock the foot into one plane like a rigid running shell, so lateral work and short runs do not feel like a compromise.

It is not the insole we choose for a long, cushioned run. The arch support is milder than the Superfeet or the CURREX, and the top layer feels closer to the shoe than to a plush recovery insole. For gym sessions, errands, and shorter efforts, that lighter feel is a plus; it does not add the rigid, built-up feel of a premium shell.

What we noticed is that it does not try to be a premium running insole, and that honesty is why it works in a gym bag. It gives an old pair of shoes a useful second life without asking you to rebuild your stride around it.

Softness is the first thing you notice in the Spenco Polysorb Cross Trainer, and that is both its appeal and its limitation. The Polysorb foam, SpenCore heel pad, and forefoot crash pad put cushioning where a runner lands and pushes off, so sensitive feet get a more forgiving surface than a firm shell provides.

We like it for recovery runs and for runners who find rigid insoles exhausting. The trade-off is volume: the heel is substantial, and in a low-volume running shoe it can lift the back of the foot enough to change the fit. If your shoe already has a snug heel, try it with the original sockliner removed first.

The cushioning is generous without feeling like a marshmallow; it has some spring to it. We keep it in the rotation for easy days, not for tempo work where a firmer platform is more useful.