So that's even really a qualitative matter !!! Really Great! The material is really awesome! Very classy! Very flexible! For the seat, it is necessary that goes around an elastic band around the mattress. So go for solid globige parts to the floor that's nothing. I have a kind of mattress seat bottom and backrest as well as a loose part (can also be a bed functional sofa). Only the seating area should be to raise, so that one can undergo large elastic cord. Moreover, armrests are still sewn which I have but underlaid with 2 large rolls of the Ikea! Cover fits exactly to the specified maximum size! Super thing, I highly recommend going to me if it should eventually go broke buying the same again.