Unisex Rubber Rain Overgloves
Cheapest, waterproof riding glove option available
There's not a lot cheap rain gear that you can trust but if you're looking for a cheap pair of gloves that will keep your paws dry no matter what, fit over regular riding gloves, doesn't break the bank and packs away small you can't beat a pair of these rubber rain gloves.
They come in unisex sizing, meant to fit over your regular riding gloves. With a long cuff to go over your jacket and keep the rain out.
Travel tip: pack as a windproof alternative in addition to waterproof for use in colder weather!