Product introductionOuter Material: SyntheticInner Material: SyntheticSole: RubberShoe Width: NormalBreathable and comfortable upper, excellent for long walking and sportInvisible Heel height: the effect is remarkable, showing your masculine charm also makes you look taller. come with a removable insole, so you can wear them for 6cm or 8cm different height increases.Suitable for: gym, outdoor sports, vacation, dog walking, jogging, daily activities.SIZE CHART4 UK=EU 37=foot length 9.25''=23.5CM5 UK=EU 38=foot length 9.45''=24.0CM6 UK=EU 39=foot length 9.65''=24.5CM6.5 UK=EU 40=foot length 9.85''=25.0CM7.5 UK=EU 41=foot length 10.04''=25.5CM8 UK=EU 42=foot length 10.24''=26.0CM9 UK=EU 43=foot length 10.44''=26.5CM9.5 UK=EU 44=foot length 10.63''=27.0CM