Is the KEEN Hightrail fully waterproof?

Yes. It uses a waterproof membrane plus a water-resistant upper treated with DWR, so it handles rain, puddles and wet trails. Water can still enter over the top of the boot in deep crossings.

How does it compare with heavier leather hiking boots?

It is lighter and more flexible, so it feels quicker on the trail and breaks in fast. Heavy leather boots offer more stiffness, protection and long-term durability for rough, loaded trips.

Is it good for hot weather?

The mesh lining helps air circulate, but the waterproof membrane traps some heat. It is comfortable in mild to warm conditions; very hot, dry hikes favor a non-waterproof, more breathable shoe.

What kind of trails is it made for?

Maintained trails, day hikes and moderate terrain with mixed weather. The high-traction outsole grips dirt, gravel and mud, but the softer build is not ideal for technical scrambling or heavy multi-day loads.

Does it need breaking in?

Less than stiff leather boots. The flexible, athletic build is comfortable fairly quickly, though wearing it on shorter walks first helps confirm the fit.