Is the Nike Free Golf good for walking 18 holes?

Yes. It is one of Nike's lightest, most flexible golf shoes, and the Free forefoot bends with your foot on the stride. The low stack height means less underfoot cushioning than a max-cushion shoe, so it suits walkers who like ground feel.

How does it compare with the Nike Air Zoom Infinity Tour?

The Free Golf is lower to the ground and more flexible, with a spikeless rubber outsole. The Infinity Tour has more cushioning, a plate and more aggressive traction, so it suits players who want stability and energy return over barefoot feel.

No. It uses a spikeless wet traction rubber pattern, so it is course-friendly and can be worn to and from the clubhouse. Expect less bite in soft, wet turf than a shoe with removable spikes.

Is it actually waterproof?

Nike backs it with a one-year waterproof warranty, so the upper is built to keep water out in normal wet conditions. It is a membrane-backed shoe, not a full leather model, so re-treat it if the surface stops beading.