Insta Slim Mens Compression Firming Supportive Posture Belt For the man who wants to look his very best Slims, firms, and tones your midsection Improves your posture 72% Nylon/28% Spandex, machine washable, made in the USA Available in Men's sizes Large (34-36 waist), X-Large (38-40 waist), and 2X-Large (42-44 waist)