COMFORTABLE AND EASY TO USE SLEEPING FUNCTION FOR "2-SEATS" SOFA : PF 275-B-5 - easy unfolding, assisted by springs, backrest to be lowered, - comfortable sitting and sleeping (17,5 cm mattress height, 2 m sleeping length), - more ergonomic sitting - the seat inclined at 2,2º angle, - smart solution - does not damage the floor while unfolding and folding.