The Spring Revolution 2.0 Postural SS Baselayer 55 is a short-sleeved shirt made with the soft and breathable Dryarn® which serves to optimize the wearer’s posture, improving both breathing and oxygenation.Spring Revolution 2.0 Postural SS Baselayer 55 FeaturesPostural support structureMassage structureSpring Revolution 2.0 Postural SS Baselayer 55 Materials65% POLIPROPILENE / 24% POLYAMIDE / 11% ELASTANESpring Revolution 2.0 Postural SS Baselayer 55 SizingS (86-92cm chest)M (92-98cm chest)L (98-104cm chest)XL (104-110cm chest)2XL (110-116cm chest) More info