Remo Skyndeep Crimplock Symmetry conga drumheads were created to add flexibility in our manufacturing while increasing available drumhead dimensions. This means, Crimplock Symmetry drumheads can fit more conga drum models from the various manufacturers in the industry.Skyndeep is the graphic infusion of pigment into a polyester surface making it uniquely attractive while maintaining the integrity of a great sounding drumhead. Skyndeep is weather resistant, producing warm tones, increases sound volume and projection in any environment.