Material: Shell: Polyester 100%; Core: Neoprene 100% Bones: No LIGHT WEIGHT UNDERSHIRT - Highly-elastic fibre which insures men suit shirt won't hurt your skin partially during running, jogging, hiking, offering excellent comfort and full range of movement, extremely breathable, heat absorbing and sweat releasing. FAT BURNING ASSISTANT - Our tank shirt is specifically designed to reduce the appearance of Gynecomastia, hide ""man boobs"", deal with ""beer belly"". Breathable for improving blood circulation and fat burning, and strongly chest shaping while workout or gym. HIDDEN & SLIM BODY SHAPER - High quality polyester will perfectly snug fit your body, the comfort yet practical design of our mens slimming compression undershirt provide immediate slimming effect while wearing it underneath all types of clothing, such as workout shirts, t-shirts, sweaters and formal dress shirts, you will almost forget wearing sports vest. SWEAT ACTIVEWEAR - Our shaper vest uses a heat-trapping neoprene fabric to boost your natural body heat and stimulate sweating with any type of physical activity. Wearing Sweat Shaper while working out or while performing daily activities, or even at work, creates a hot sauna-like experience. COMPRESS & INSTANTLY ABDOMEN SLIM - This compression shirt works well with putting the loose skin in a tight firm place which helps you get rid of unwanted fat rolls, lumps and muffin tops without causing any discomfort, flattening your chest and abdomen. POSTURE & BACK SUPPORT - Men's tight body shaper, ligher thermal abdominal compression and lumbar support to help posture for back and abs as you workout. So that you'll have a firmer posture, higher back support. SUITABLE OCCATION - This male gym muscle shirt best for zumba, yoga, gym, fitness, running, cycling and much more sports, fat burn and lose weight and body building, reduce your belly size and enhance pressure on the belly, helps you have a nice body shape.