Pillowtop has a minor variation to it, known as a Euro-top. As the name suggests, this type originated in Europe and is much more common there. Both acts as a comfort layer to alleviate pressure points.
Traditional Pillow Top
A traditional pillow top is sewn on top of the mattress with a prominent gap above the support layer, giving the impression of extra padding.
Euro-Top
In a Euro-top, the extra padding layer is sewn underneath the mattress’s cover, making it look more level and uniform. In addition, euro top layers are comprised of foam or white fibre, making them appear thicker and denser than a traditional pillow top.