Splits59 Essential Icon Sweatpant in Black. - size XS (also in L, M, S) Splits59 Essential Icon Sweatpant in Black. - size XS (also in L, M, S) 87% supplex nylon 13% lycra. Stretch fit. Waistband slit pocket. Elastic leg opening. SPLR-WM164. E1055. High-performance is apart of the Splits59 brand DNA. The LA based line is full of innovative activewear for women that blends advanced fabrics with sleek silhouettes. With features like quick-dry sport performance fabrics, flat seams, fluff threads and plush elastics each piece is design to keep you looking fabulous and feeling great while going the extra mile.