The Zuri platform bed comes with 15 sets of 10mm Euro-Slats which requires a mattress only, Not Included. Industry standard have been 13 sets of 9mm, however, the mattress companies have taken issue and now require that the Euro-Slats be spaced a maximum of 3" apart or the mattress warranty is void. Their concern is that the springs can get caught between the slats and damage the mattress. All of our platform beds are in compliance adding additional support and comfort.We use solid wood legs on all beds, no plastic. Also, our tapered legs feature a wood dowel to insure that the legs are attached correctly and prevents them from spinning. Notice that our headboards are one piece, no long extension legs.Our Beds have been specifically engineered to offer you the most stable and durable plaform available. This cost a little more, but it''s well worth the benefit of having a top quality bed.