The Sondico Base Mock Neck Top comes with mesh ventilation panels for breathability and improved airflow. Making this design even more comfortable is the rubberized hem for a secure fit.. . Rubberized trim hem. Mock neck. Mesh paneling under the arms. Long Sleeves . Shell: 92% polyester, 8% elastane. Mesh: 82% polyester, 18% elastane. Machine washable. Keep away from fire and flame. Imported. 2427389035108 32351000045 427389