Silk PLA+, Silky Royal Navy Blue, 1.75mmSilky Royal Navy Blue Silk PLA+ is a satiny smooth deep blue. Not quite navy blue, not quite royal blue, but somewhere in between 3D Fuel Silk PLA+ is more durable with better layer to layer adhesion than other super shiny silk PLAs on the market. While 3D Fuel Silk PLA+ is not quite as tough as our Standard PLA+, it is remarkably tougher and more durable than other silk PLAs you may have printed with in the past. We use only virgin, made in the USA