>>1023301>>1023352You're probably meaning a greatcoat.
>>1023423Dusters are not trenchcoats are not greatcoats. Dusters are riding coats against dust and rain; trenchcoats are infantry coats against rain. Both are made from rather thin fabric: oilskin or canvas for dusters, gabardine from various materials for trench coats. Greatcoats are for warmth (and somewhat water repellent) and made from thick wool.
>>1023413>Long coats snag on thingsNot unless you walk through thick brush.
>they get in the way of your mobility (ex., mountain biking, trail running, climbingTrue.
>they don't replace insulated or water-resistant pants completely so you'll usually need bothDepends. You might want these for real extremes, but that's not what everyone deals with. A coat is also more breathable and adjustable. For example, walking with a coat will allow air exchange around the legs and give you less insulation than standing, so you've got a bit of automatic adjustment for your warmth.
Either way, there's good reasons people used coats historically and I'd prefer if it was still common and acceptable for men to wear them, they provide simple and comfy warmth especially for the legs. Women (who have both different fashion and are usually colder) still wear them. And there's no reason not to make a coat from modern fabrics.
