In the fast-fashion industry, inventory is considered as a perishable good leading with short selling periods and desirable short stockage within the stores. The main objective of transshipments is to equilibrate stocks across the store-network for a better balance between the supply and the demand. This article studies, simulates and improves transshipment decisions in a fast-fashion retail network to better fit the corresponding inventories and demands at different points of sale (PoS), including the manufacturer warehouse and a certain coverage level, which should result in increased unit sales and more efficiency. The main benefit is better matching inventory/demand at different locations.