If you want a comfortable work out this Sondico Mock Neck Baselayer would be ideal for you due to its built in mesh panels under the arms as well as featuring Optivent technology for breathability. Powered by LYCRA® fibre for long-lasting comfort and freedom of movement. > Football baselayer > Rubberised trim > Optivent technology > Long sleeves > Mock neck > Flat lock seams > Sondico branding > Keep away from fire > Shell: 92% Polyester, 8% Lycra > Mesh: 82% Polyester, 18% Lycra > Machine washable