Rubber sole Platform measures approximately .4" 【Material of Ballet Flats】Made of stretchy knitted upper non-slip rubber out-sole and soft insole ,it’s comfortable and breathable for feet 【The Origin of Ballet Flats】 The ballet flats, also called soft-soled shoes, are derived from a woman's soft ballet shoe, featured with a very thin heel,cute and lightweight design. It looks elegant when dressed. 【Release Your Feet】This foldable flats is ultra soft and cozy.It is not restrained when walking and suitable for female groups in any ages 【Easy to Match】All-matched with all dress styles from formal dress to to daily wear. They are suitable for all seasons 【Machine Washable】The knitted upper and movable insole make it easy to clean without being out of shape