Opal XS Mirror Foam Seal Goggle (Lilac) Review BitterGnoll February 18, 2018 July 24, 2018 No Comments on Opal XS Mirror Foam Seal Goggle (Lilac) Review An old favourite returns! A high quality Speedo racing goggle, also suitable for training with a foam seals, a great alternative to rubber or silicone seals if you suffer from soreness around the eye after swimming.