Bergen. Height increasing boots. Bergen is a lace-up boot made from premium quality cowhide. It has a flexible, resistant and adherent rubber sole that makes it ideal for cold and rainy days. It stands out for its simple design and durability. Clean your shoes to be tall with a semi-damp cloth, making circular movements. Let them dry for a few minutes and apply cream with a spreader brush. Lastly, brush them with a clear brush to get a little shine.