The total height increase of these 4-inch men's elevator boots includes the visible outsole and hidden insole. To increase your height by a further 1.2cm or 1.6cm, select one size larger and insert 1.2cm Ezylift insoles or 1.6cm Ezylift insoles.   FEATURES OF MR. BARON BLACK Leather height-increasing boots with laces and side-zip Upper material: Premium grade cow leather Outsole material: Premium rubber Insole material: Non-compressing polyurethane with JENNEN cushion comfort layer Total height increase: 10cm Visible outer heel thickness: 3.5cm Built-in, hidden lift insole thickness: 6.5cm   ABOUT MR. BARON BLACK Worn by police officers, security guards and bouncers, Mr. Baron is a bold and masculine style. Featuring a side zip for ease of use and capped lace-hole eyelets for durability, the shoelaces can remain laced-up at all times, saving time. Like all our quality elevator shoes, Mr. Baron will not set off any alarms when walking through airport scanners. When you wear these masculine height increasing boots, you'll look and feel like a man in charge. Mr. Baron elevator boots offer you a substantial height increase, but they also feel comfortable and are built to stand the test of time.