PSA: have thighs? have chub rub? yeah me too. i've talked about slip shorts before, they're great, but sometimes you wanna wear a skirt or dress that's shorter than your slip shorts. or it's too fucking hot for another layer. or both.
there exists a class of product that solves this exact problem: anti-chafing sticks. turns out they're reliable enough that i pretty much haven't worn slip shorts this year.
there's the kind marketed at runners and the kind marketed at chicks, but i think they're pretty much the same stuff: some sort of lubricant and something to make it stick.
i've been using Megababe Thigh Rescue. they did not pay for this endorsement (can you fucking imagine? there are like six people on Fedi who care about fashion) nor is that an affiliate link. but it was the first one i tried and it works all day in heat conditions including the literal Mojave Desert and it hasn't given me a rash so i'm giving it the Vyr Thumb Up of Approval 👍
idk how this works if you have hairy legs, so if someone tries that, please report back. i'm guessing it's not great but life is full of surprises. someone has confirmed that anti-chafe sticks do still work if you have leg hair, but you may need to re-apply periodically.
finally: some people will tell you to use a deodorant sticks instead, but from personal experience that doesn't work very well, so don't do that. use a purpose-built lubricant instead of an antiperspirant that happens to come in a paste.