mewho: have you ever worn leggings or thick tights? Why do you assume that it is ‘enough”? The Bach clearly thought differently.
To Sam2 and DaasYochid: I have followed your back and forth but as I do not have access to the Teshvas Horashbo-I cannot comment. However, I doubt that there is anything that is “inherently’ masculine or feminine. Clearly, viewing into mirrrors, wearing robes or pants (my thanks Sam2 for the gemoro Niddah), shaving itself are all things that have changed over the years. I would include tinting one’s hair in this. Many men tint their hair today- why should that be ossur? Customs change and so does anything based on “what is normal” (see covering a woman’s hair and kiras shema in the Aruch Hashulchan and other Poskim)