Non-latex polyisopreneRoyal Blue colour for enhanced contrast to the teeth and improved dental imagingMedium or Heavy gauges5"x5" and 6" x 6" sizesTear resistant with superior elasticityKeeps operatory field dryEasy to place and floss the Isodam HD dental dam without the need for lubrication Non-Latex Polyisoprene. Tear Resistant With Superior Elasticity. Keeps Operatory Field Dry. Royal Blue Colour For Enhanced Contrast To The Teeth And Improved Dental Imaging. Isodam HD provides the award-winning performance of the Isodam non-latex dental dam in a royal blue color for enhanced contrast to the teeth and improved dental imaging.