This is a thigh-up sketch by Ahro, coloured by me using Ahro's highlighting for the fur, and as a general guide for the rubber. It shows Quirk the protogen trying out a rubber dress.
As a rule nobody notices he's cross-dressing because protogens aren't very dimorphic.

There are also versions with a red dress, or red gloves and leggings - I couldn't decide which one to post, so I've also uploaded the red variations here: https://www.weasyl.com/~tapewolf/submissions/2228661/quirk-s-red-outfits-ahro-collab

Lines and lighting guides by - I love how he turned out!