IVL Collective Bootcut Legging in Black. - size 4 (also in 6, 8) IVL Collective Bootcut Legging in Black. - size 4 (also in 6, 8) 72% nylon 28% spandex. Made in China. Hand wash. Split cuffs. Stretch fit jersey fabric. 10 at the knee breaks to 12 at the leg opening. IVLR-WP3. IVLC437-01. Shop the latest in fashion from IVL Collective