Discraft's Pro D plastic is their lowest end plastic.  Smoother feeling than Innova's DX plastic, Pro D plastic is the stiffest and least expensive of Discraft's plastics.  The least overstable of Discraft's plastics, the wear characteristics of Pro D plastic is also similar to Innova's DX plastic but it has a tendency to irreparably lose its shape.  However, most of Discraft's discs have been designed in their Elite X plastic and the Pro D versions tend to not fly quite as far.Strengths:Least expensive.Very uniform wear.Easy to break in.Remains grippy in wet conditions.Weaknesses:Less durable overall.Propensity for scuffs, scrapes, and dings.Tendency to lose its shape.Stamp color will vary.