Is the X Ultra 5 Mid GTX actually waterproof?

Yes. It uses a Gore-Tex membrane inside the boot, so it keeps water out in rain, wet grass and shallow puddles. Water can still enter over the top of the mid collar in deep crossings.

How does it compare with the X Ultra 4?

The X Ultra 5 keeps the lightweight, agile feel of the line and updates the upper and collar for durability and comfort. It is an evolution rather than a redesign, so fans of the 4 will recognize the fit and ride.

Is it good for wide feet?

The X Ultra line tends to run on the narrower side. Salomon offers a wide version of this boot, so shoppers with broader feet should look for that fit rather than sizing up.

Can I use it for backpacking with a heavy pack?

It works for light overnight trips, but it is a lightweight mid-cut boot. For heavy loads and rough off-trail terrain, a stiffer boot gives more support and protection.

Does it need breaking in?

Most hikers find it comfortable out of the box with little break-in. Give it a short walk before a long hike to confirm the fit around the heel and collar.