Vanilla SDT hoodie with the hood down, unzipped.
I was unsatisfied the unzipped pack's lack of greyscale variations when dressing my Technicolor pony people in comfy hoodies, so this is my trivial colour mod of @BrokenToaster's unzipped vanilla hoodie design. Full credit goes to the real author! Since this mod's main colour is a pure greyscale (S=0), it supports skin tinting using the "Her Skin" HSL sliders.
Other colours are available in BrokenToaster's clothing thread under "Tops". They won't support tinted skin though.