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Product description For competition and training and for any specialty you practice, the Jifter glasses fulfil what you ask for. Full protection from sunlight and any external influences they can affect, good anti-fog performance, lightness, perfect stability and comfort are the features that make them a sports glasses as solvent as they are attractive; Product description For competition and training and for any specialty you practice, the Jifter glasses fulfil what you ask for. Full protection from sunlight and any external influences they can affect, good anti-fog performance, lightness, perfect stability and comfort are the features that make them a sports glasses as solvent as they are attractive; For competition and training and for any specialty you practice, the Jifter glasses fulfil what you ask for. Full protection from sunlight and any external influences they can affect, good anti-fog performance, lightness, perfect stability and comfort are the features that make them a sports glasses as solvent as they are attractive