I found this one which is the closest to your description, but it is not 4m but 2,5m… looks like the good one, and there is no 4m wide ones which I could find…

Cielo Hamacas

Ochil, Matrimonial, Algodón

La Hamaca Más Vendida en Amazon. Color natural y diseño atemporal. Tamaño ideal para 1–2 adultos: Espaciosa y cómoda.