Is the X Ultra 360 Mid GTX truly waterproof?

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

How does it compare with the X Ultra 4 GTX?

The 360 is the lower-tier model: simpler upper, less refined cushioning and a firmer ride. The X Ultra 4 GTX is lighter and more comfortable out of the box but costs more. Choose the 360 for occasional wet day hikes.

Does it fit true to size?

It runs snug and narrow. Most hikers go true to size for thin socks, or a half size up for thick socks and long descents. Wide-footed hikers should try before buying.

Is it good for hot weather?

It is warm. The Gore-Tex liner blocks breathability, so it suits cool, wet and shoulder-season hikes better than summer heat. For dry summer trails, a non-Gore-Tex low-cut shoe vents better.

What is the ankle support like?

The mid-cut collar adds support and keeps debris out, but it is a flexible shoe, not a stiff backpacking boot. It suits day packs and light loads, not heavy multi-day packs.

Can I use it for running?

It is a hiking shoe, not a running shoe. The firm midsole and protective outsole work for fast hiking and light trail running, but runners wanting cushioning should look at Salomon's trail running line.