The Under Armour Women's Rival Fleece Crew is a top-rated activewear sweater on Amazon. It is made from a blend of cotton and polyester fleece, providing a soft and comfortable feel. The loose fit and raglan sleeves allow for unrestricted movement during workouts or casual wear. The ribbed cuffs and hem ensure a secure fit, while the brushed interior traps heat for added warmth. This versatile sweater is perfect for layering or wearing on its own. With its popularity and positive reviews, it's no wonder why this sweater is a favorite among women.