Narrow Tank Narrow Tank 50% poly 38% cotton 12% rayon. Slub knit fabric. Ribbed trim. Made in USA. HARL-WS768. HT2176MHJ. Launched in 2007 as a basics label, Monrow has quickly risen to the top. Designers Michelle Wenke and Megan George have created a line of fundamentals-quintessential wardrobe staples with attention to fit, fabric, technique and innovative prints.