If you you know she likes Furla, that would the best place to start
In my collection I would say my vintage lamb Chanels, grab bag and BVs are very, very soft but also very fine, whereas chevre (goat skin) on my latest BV hobo is soft, thick and undulating and then again my Hermes Swift feels like velvet.
Thanks papertiger and thank you all! You're amazing.
So, seems everyone agrees lambskin is the softest but also very delicate. I'm not sure if this leather could be a great choice for a big bag (so not clutches, but totes or hobo, since this is the bag I would like to design for my lady). Also goatskin, being thicker, and given that BV uses it for hobos, could be my choice.
I've read Prada uses also full grain calfskin. I was expecting this was the softest and also the most appreciated, but seems not! That's really interesting.
I've also found that calfskin leather could be treated to have the same look of deerleather. I personally prefer the smooth feel of leathers without the grainy look, so maybe pure full grain calfskin is not what I'm looking for?