Lululemon Running Quarterzip

This is quite a few years old but still in great condition so I’m not sure of the model or the size— it’s either a 4 or 6. Reflective detail on the seams, thumb holes and folded sleeves (to tuck hands in on a cold day) plus venting at the underarms and on the back. So cute and versatile! Please NOTE- unsure of the size- this is either a 4 or 6 but fits snug and I am usually a 6