Are these boots fully waterproof?

The leather is oil- and water-resistant, not a rubber shell. They handle wet grass, mud and rain well, but standing in deep water or long soaking will eventually get through. Regular conditioning keeps the leather shedding water.

How do they fit compared with rubber wellingtons?

Leather wellingtons like these usually fit closer to your normal shoe size than slip-on rubber boots, which run roomy. The insulated lining adds some bulk, so try your usual size first and size up only if you wear thick socks.

Can the soles be replaced?

Yes. The welt construction means a cobbler can stitch on a new outsole instead of you replacing the whole boot. That is a real advantage over molded rubber wellingtons.

Are they good for summer wear?

They are better suited to cool and wet weather. The insulated textile lining traps warmth, so expect warm feet on hot days. For summer farm work, an unlined leather or rubber boot breathes more.

What should I do to maintain the leather?

Wipe off mud after use, let them air dry away from direct heat, and apply a leather conditioner or wax a few times a season. That keeps the tan full-grain leather supple and preserves its water resistance.

The pair of boots is the main item. Expect the boots themselves with their factory insoles; no boot trees, conditioner or extra laces are typically included.