SIZE CHART: M: suitable for weight 50-60k; L: suitable for weight 60-70kg; XL: suitable for weight 70-77.5kg; XXL: suitable for weight 77.5-85kg; 3XL: suitable for weight 85-97.5kg; 4XL: suitable for weight 97.5-102.5kg; 5XL: suitable for weight 102.5-110kg; Hook and Loop closure SWEATING MORE: Waist trainer for men provides excellent training performance for your waist and abs, innovative polymer fabrics lock heat from inside, fastly lose your belly fat and sweat your waist off. BACK SUPPORT: Signature compression and internal flexible boning hold your back and abdomen tight, giving you the back support, reducing waist line and preventing garment roll-up. This great product really helps you with back pain and proper posture. SPECIAL DESIGN: Under-bust design give a free space so that you could do exercise breath freely. BENIFIT: intelligent fabric technology create the Core compresses your figure front to back comfortably and firmly, helping to flatten your midsection and give you a straighter, more confident posture while wearing this waist trainer.