I finally found ankle boots that I love everything about but they have a leather sole except the back half of the heel is rubber. I had a shoe shop had vibram soles to a pair of old shoes once that were too slippery so I'm wondering if I should maybe think about that with these but I'm worried it will ruin the sleek look of them. I would like to be able to bring them to Europe and wear them at home in Minnesota on non-snow days. Thoughts?