Five tens here too. Only some come in smaller sizes but five ten are launching a women’s specific range. Elements are the waterproof type ones.
Race face Womens khyber shorts are excellent for winter riding as they are fairly thick tweedy type material and water resistant. Best shorts I have and as comfy as my dakine which is saying something. Buy her a decent short liner though.
I’d also recommend waterproof socks, as many ladies have thin feet meaning that the water gets in easily and we feel the cold easier (because womens fat is more concentrated on the female areas).
Don’t underestimte the lure of a bright camelbak…….lost track of the number of people who have commented on my bright yellow/lime one.