3LHD is an acclaimed architectural practice that integrates architecture, art and (urban) landscape. Their projects, such as the Memorial Bridge in Rijeka, Riva Waterfront in Split, Spaladium Center, Hotel Lone, Hotel Grand Park Rovinj, Hotel Adriatic and many others, have established them as one of the key drivers in Croatian architecture. For Prostoria, 3LHD designed the Umomoku outdoor collection. The collection was initially designed for the luxury beach Mulini in Rovinj and subsequently redesigned for serial production. 3LHD design for Prostoria also includes Shtef shelf system.