The duvets covers will be backed with colour co-ordinated, plain dyed, 50/50 polycotton sheeting fabric. The pillow cases can usually be backed in the patterned fabric from the reverse of the single duvet cover.
Since these duvet sets are converted from the single-sized sets, the finished result will depend on how well the design lends itself to modification. In general, reversible sets usually do not convert well as they have a full design panel on both sides.

Please contact me for a quote preferably with a specific duvet set in mind that you have seen as a single size (an online source of the duvet set would be ideal).