Tilly's Butter Soft Square Neck Top. The Tilly’s Butter Soft Square Neck Top is a sleek essential designed with comfort at the forefront. This solid-color sleeveless top features a clean square neckline and wide 1" shoulder straps for a flattering, supportive fit. Crafted from signature butter soft fabric, it feels incredibly smooth and luxurious against the skin. Lightweight and comfortable, it’s perfect for warm days or layering, offering a polished look with an irresistibly soft feel. 96% Polyester 4% Spandex. Hand wash. Imported.