What actually happens to a paw on hot pavement
Dog paw pads are tough but not immune to heat, and asphalt or concrete in direct summer sun can reach temperatures well above the air temperature, hot enough to burn skin within seconds. A well-made, properly fitted boot with a solid sole puts a physical barrier between the pad and the surface, which is the main reason boots help: they stop direct contact with the hot surface rather than making the paw itself heat-resistant.
Where boots help most
Boots are most useful on short exposures to genuinely hot surfaces, a driveway, a car park, or a stretch of dark asphalt in full sun during summer, rather than as a substitute for avoiding the worst of the heat altogether. A thick, rubber-soled boot insulates better than a thin fabric one, and boots that stay securely in place matter more than boots that just look protective, since a boot that slips off mid-walk offers no protection at all.
The simple test that still matters
The classic guidance still applies even if your dog wears boots: press the back of your hand to the pavement for seven seconds, if it's too hot for your hand, it's too hot for paws, boots or not. Boots reduce risk on a hot surface, but they don't make walking on very hot pavement safe for an extended period, and rubber soles can themselves absorb heat over a longer walk.
Other ways to protect paws in hot weather
Walking early morning or evening when pavement has cooled, sticking to grass or shaded paths, and carrying your dog across short hot stretches are all valid alternatives or complements to boots. Dogs that refuse to wear boots aren't left without options, route planning around direct sun on hard surfaces protects paws just as effectively for most everyday walks.
When to see a vet
If a paw pad looks red, blistered, or your dog is limping, refusing to walk, or licking at their feet after being on a hot surface, treat it as a possible burn and contact your vet rather than waiting to see if it settles on its own. Burn severity isn't always obvious just from looking, and pads that seem mildly affected can still need proper care.
Treat boots as one layer of hot-weather protection rather than the whole plan. Combined with route timing, shaded paths, and the hand test before setting out, boots add a genuine margin of safety on the unavoidable stretches of hot surface, the driveway, the car park, the last few metres to grass, without giving false confidence that a dog in boots can handle an entire walk on midday asphalt.