Simply Safe. The Natural Classic is the best-known condom by the brand Durex. The condoms are transparent, neutral taste and odor arm. The condoms come with lubricant and reservoir. Condom Features: - Taste: Neutral - Lubricant: Normal - Color: Transparent - Structure: Smooth - Size: Medium - Nominal width: 52 mm - Thickness: Normal - Package quantity: 20 - Brand: Durex Recommended for: In general every tested condom is safe for vaginal, oral and anal contact, as long as the fit is good and there is enough lubricant.