Rainwear - Overalls

The coverall seals better at the waist because there is no separation there, which prevents leakage at that point.

Yes, the coverall has a roomy fit and snap fasteners along the side, so you can quickly put it on over your workwear and boots.

That differs per model. In addition to a class for waterproofness, EN 343 also gives a class for breathability, from 1 to 4. A coverall with breathability class 1 keeps out rain but removes little body moisture. Models with breathability class 3 are more comfortable for heavy or prolonged work.

Rinse off mud and dirt with lukewarm water after use and let the coverall air dry hanging up. Wash it only when needed and according to the label, without fabric softener. Check the seams and zips regularly; a damaged seam lets water through, even if the fabric itself is still intact.

An American coverall has a high chest panel, so no water runs down your back when you bend. You combine it with a separate rain jacket and can take that off in dry weather. This keeps your legs and torso dry while you retain more freedom of movement than in a full coverall.