Been there with 6 companions and I would rather say that it's a 4 person bivacco with 1 extra bed. Definitely not comfortable with 6.
[comment moderation : not very roomy for 6 people, it's sure ! But there are 6 places to sleep at the end. Better for 4 people and no more, you're certainly right - samy]
Retour sur la fiche de Bivouac Nebbia sans action.