The D4 is the understable compliment to the D1 from Prodigy Discs. The D1 and D4 were the first 2 discs released by Prodigy. For the advanced player, the D4 will hold long turnover and hyzer-flip throws. A recreational player will find the D4 to be a straight stable driver, making it a great core driver. The 750G Series is a premium blend of material that is extremely durable and has a little more tactile flex than 750. The unique blend of plastics feels as good as it looks and will be able to be broken in over time. This tour quality plastic gives the thrower better grip even when it is wet.