Is the Puma Explore Nitro Mid GORE-TEX truly waterproof?

Yes. It has a GORE-TEX membrane plus a suede and textile upper, so rain, wet grass and puddles stay out. It is not a wading boot, so deep stream crossings can still get water in over the collar.

How does it compare with the Salomon X Ultra or Merrell Moab?

It is softer and more cushioned than both, closer to a running shoe in feel. The X Ultra is firmer and more precise on technical ground, and the Moab is heavier and more protective. Choose the Puma for comfort on easy and moderate trails.

Can I use it for backpacking with a heavy pack?

It is best for day hikes and light loads. The Nitro foam is soft and the mid-cut collar is flexible, so a heavy pack can make the boot feel unstable. For multi-day trips, a stiffer boot is a better fit.

Does it fit true to size?

Most buyers take their usual Puma or running-shoe size. If you wear thick hiking socks or have wide feet, consider a half size up, and try them on with the socks you plan to hike in.

Is it good for hot summer hiking?

It is warm. The GORE-TEX membrane blocks sweat vapor as well as rain, so it suits cool, wet and three-season conditions better than hot, dry trails. For summer, a non-waterproof mesh shoe breathes better.

What is the toe drainage port for?

It lets water that gets inside the boot drain out at the front. It helps after a stream splash or heavy rain, but it does not replace the waterproof membrane.