Latex coating -- non slip coat of latex, flexible and thin, makes your slippers more grippy on any floor.
Rubber -- thin flexible rubber soling, protects your slippers from wet conditions, suitable for inside wear.
Natural rubber -- made from natural latex, durable, non slip, good for a dash outside to grab your papers or have a coffee on a patio.
Upcycled leather -- soft, non slip soleing for very quiet and smooth experience. The leather has been upcycled from old clothing.