Sondico base core long sleeve base layer mens get the most out of your performance with this mens sondico base core long sleeve base layer which has been crafted with optivent technology which ensures sublime breathability whilst the inner rubberised grips to waist ensures a secure fit and the sondico branding completes the great look mens base layer long sleeves round neck optivent ventilation technology inner rubberised grip at the waist sondico branding shell 92