Your foam will usually be one single unglued piece, though we recently found out our supplier does not offer Soft (D65) latex in thickness > 3" without gluing layers together. Please inquire for your specific order if this is a concern for you. Our shop sometimes offers (discount) 'one-of-a-kind' pieces that have glue seams - these are clearly identified as such (e.g. states that it is glued in the item description). See this related post about the 'feel' of glued natural latex foam.