Tilly's Butter Soft Side Slit Tube Top. Slip into effortless style and comfort with the Tilly's Butter Soft Side Slit Tube Top. Made from an ultra-smooth polyester-spandex blend, this tube top feels butter soft against the skin, offering a stretchy, second-skin fit you’ll want to wear all day. Its solid color design is elevated by gathered details at the upper side seams and subtle slits at the lower sides, adding texture and movement to the cropped silhouette. Perfect for layering or wearing solo, this versatile piece brings together softness, style, and an easygoing edge. 94% Polyester 6% Spandex. Hand wash. Imported.