O2 Revolution is a dual density silicone dildo made by the wonderful Tantus company. It has a flared base which makes it anal safe and harness compatible. The dildo does not have a curve for optimal G-spot or P-spot stimulation, but the large blunt head definitely rubs the sweet spots nicely. The dildo is semi-realistic. It has the realistic head and raised veins, but it comes in three fun candy colors instead of the realistic skin tone colors.