prAna Women's Size Chart A soft and stretchy take on a classic style, the women's Foundation Turtleneck is made with a durable TENCEL(TM) Modal blend. A standard fit and back seam detailing means it's comfortably and chic enough for any occasion, so dress it up or keep it casual. Features: - Lightweight TENCEL(TM) Modal stretch jersey - Turtleneck long sleeve with back seam details - Standard fit - 95% TENCEL(TM) Modal / 5% Spandex