Vionic Snug Adeline - Women's Slip-on Loafer. The ultimate transitional shoe has landed with Snug Adeline, a mule-style slide that provides cool comfort with classic styling. Leather uppers are accented by piping and a metallic horsebit detail across the vamp. Natural Alignment with Vionic's Biomechanical Footbed. The orthotic-grade footbed supports your feet from the ground up.