COS Puff-Sleeve T-Shirt In White Crafted from a more sustainable blend with a touch of stretch, this jersey T-shirt has a regular fit. The classic shape is offset by elbow-length voluminous puff sleeves. SHELL: 67% Rayon, 27% Nylon, 6% Spandex Lining: 100% Cotton Tags: Basics, casual, short sleeve, white tee, t-shirt, work wear, daily, COS, puff sleeve, prairie, cottagecore