Is it permissible to wear unisex clothing?
Shaikh Abdul- Muhsin al-‘Abbad hafidhuhallah was asked:
There are shoes made of wood that are used for the washrooms. They are used by both men and women. So what is the ruling?
“There is no harm in this because it is not specific for men nor specific for women. They are what is used to enter the washroom”.
[Sharh Sunan Abi Dawood no. 460]
Also Shaykh Abdul-Muhsin al-Abbaad was asked:
In some lands the adornment of the women is similar to the adornment of the men and they resemble. There is no difference between them except the women veil [so what is the ruling on this type of clothing]?
If you find something like this, and this is a reality, then the imitation [between women and men] is in other matters. That is in regards to the thawb. If such and such a color is specific to the men or specific to the women and the people of the land know it, then a man does not come to wear something known to be specific to the woman or is well known to be from the specific clothing of the woman. Likewise the opposite”.
[Taken from Sharh Sunan Abi Dawood no. 460]
Faisal Ibn Abdul Qaadir Ibn Hassan