Fair Weather Camper
Thru Hiker
The most effective rainwear is a large bin liner. Find something that weighs less and packs smaller.
The most practical is a large bin liner depending upon how long you think you may be be wearing it.
That is dependent upon ambient temperatures and rain temperature.
Any membrane waterproof = plastic bag when warm and it rains. Do the condensation shuffle.
Shortish nasty heavy showers - plastic bag
All day rain - anything but never forget the simplicity and downright effectiveness of an umbrella.
It all boils down to how wet is wet and how wet do you feel really uncomfortable. Rain wet or condensation dripping.
But bin liners don't come in very attractive hues, not neither..
I will confess to having used a compost sack as a sort of apron against general filth and besmirchment around the farm but...
And how exactly, does the whole arm* thing work for you, if you're using a bin bag??
*don't tell me - he's quite 'armless