MONROW Sporty Lightning Sweatpant in Gray. - size XS (also in ) MONROW Sporty Lightning Sweatpant in Gray. - size XS (also in ) 62% rayon 30% cotton 5% spandex 3% poly. Elasticized drawstring waist. Side slant pockets. Banded leg openings. HARL-WP415. HB0186 7. 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.