Clinically proven through science

Blue diamond® condoms have been clinically proven to maximize firmness and hardness by stimulating blood flow within the penis. In an independently conducted study comparing blue diamond® condoms against a standard condom, 74% of men who expressed a preference between the two condoms said that the blue diamond® condom gave them a firmer erection. In the same study 72% of the female partners who expressed a preference also noticed an increase in the firmness of their partner’s penis and 63% felt that as a result of their partner using the blue diamond® condom they enjoyed a longer lasting sexual experience.
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