Is the Clifton 11 GTX actually waterproof?

Yes. It uses a GORE-TEX Invisible Fit membrane plus a water-repellent treatment, so rain and splashes stay out. It is not a wading shoe; deep puddles can still enter over the collar.

How does it compare with the regular Clifton 11?

Same soft EVA ride and Clifton shape, but the GTX adds a waterproof upper, wet-grip rubber and reflectivity. In return it is warmer, less breathable and heavier.

Is it good for long runs and daily training?

Yes. The cushioned midsole suits easy and long road miles. It is less lively than lighter trainers, so it works best as a comfort shoe rather than for fast sessions.

Can I use it on trails?

It is a road shoe. The outsole and traction pods are tuned for pavement and wet paths, not loose or technical terrain.

How does the fit run?

It follows the Clifton last, which many runners find true to size with a roomy toe box. The waterproof upper can feel slightly snugger through the midfoot.