Impressions Micro G-String Blackl S/M from Male Power Underwear. For those who want to leave very little to the imagination, the Impressions Micro G-String is for you. The classic front and V-back make this piece irresistible. Semi sheer fabric completes this daring men’s g-string.Semi Sheer light weight fabric with an embossed abstract swirl pattern. Fabric content 90% Polyester, 10% Spandex. Waist sizes 28 inches to 34 inches. Men sizes small to medium. Hand wash separately, Cold water. Line dry. Do not bleach. Made in the USA.