A knitted dual-layer fabric for manufacturing garments such as underwear and sportswear for wearing in the outdoors is described. The dual-layer fabric comprises a first layer, the first layer being an inner layer adapted to be in contact with the skin and having water repellent or hydrophobic properties, and a second layer, the second layer being an outer layer having hydrophilic or water absorbent properties, and a binding interposed between the inner layer and the outer layer to bind and tie the layers.