Small - 38/40 Inches Chest Medium - 40/42 Inches Chest Large - 42/44 Inches Chest XL - 44/46 Inches Chest 2XL - 46/48 Inches Chest 3XL - 48/50 Inches Chest 4XL - 50/52 Inches Chest 5XL - 52/54 Inches Chest The Mens Tank Top Is Made Of Cotton, Soft And Skin Friendly, Moisture Wicking, Not Easy To Pilling, Not Easy To Fade. Flat Seams Help Reduce Irritation Caused By Chafing, This Sweat Resistant Undershirt Is Ideal For All Kinds Of Indoor And Outdoor Activities Like Workout, Training, Jogging, Running, Fitness, Gym, Lounging, Etc. Great for wearing in the summer - the mesh keeps you cool and allows ventilation, while the cotton string absorbs perspiration. In the winter, the vest adds a base layer to help keep you warm DESIGN: 100% Cotton Stripe String mesh vest design helps you show your healthy muscle, to make you more attractive. Wear with a vest under the mesh shirt, or with a leather jacket that makes you a fashionable street look.