BERTHA W BLACK NUBUCK. Featuring convenient zip trim and simple outline, the BERTHA boot by Ziera is all you need for everyday style and support. It features a removable Active Comfort footbed designed for superior shock absorption, made from flexible PU with arch support, a metatarsal bump and contoured heel cup, reinforced with PU gel and a TPU stabilizing cradle that runs from heel to arch. The footbed is removable and can be swapped for your own orthotics. This style features the Ziera W fit, a standard width which should suit most people.