Means size medium, only worn once. EUC. measurements in photos. Thanks for shopping my closet! Meet your newest training partner. This anti-stink long-sleeve shirt will keep up with sweaty workouts abrasion-resistant fabric Abrasion-resistant fabric is sweat-wicking and quick-drying Abrasion-resistant Sweat-wicking Quick-drying lycra® Added LYCRA® fibre for great shape retention stretch great shape retention long-lasting comfort features Designed for: Training Anti-stink technology: No-Stink Zinc (zinc pyrithion) stops the growth of odour-causing bacteria on the fabric Lycra®: Added Lycra® fibre for shape retention Mobility: Underarm gusset for greater mobility Ventilation: Bonded eyelets for airflow Side slit: Side slits at hem for added mobility