Is the Salomon X Ultra 360 GTX truly waterproof?

Yes. It has a Gore-Tex membrane and a textile upper that shed rain and splashes. Feet stay dry in wet grass and shallow puddles, though water can still enter over the collar in deep crossings.

How does it compare with the X Ultra 4 GTX?

The 360 GTX is the value-oriented model in the line. It keeps the Gore-Tex lining, Contagrip outsole and quick lacing but uses a simpler upper and midsole than the X Ultra 4, which is more refined and often more cushioned.

Does it fit true to size?

It fits close and narrow, so many hikers go half a size up, especially with thicker socks. Try your usual Salomon size first if you have normal-width feet.

Is it good for wide feet?

Not ideal. The shoe has a normal-width last and a snug midfoot, and wide-footed hikers often find it tight. Salomon's wide versions of other X Ultra models are a better match.

Can I use it for multi-day backpacking?

It works for light overnight trips but is not built for heavy packs. The low cut and moderate cushioning suit day hikes and fast, light loads better than multi-day trekking.