T-shirt Fine Rib Tee from Filippa K. Made from organic stretch cotton, this classic wardrobe staple is a timeless favorite year-round. With a slim fit, it’s perfect for layering under blazers and shirts, or wearing on its own with trousers. Lightweight, short-sleeved, and featuring a crewneck – a versatile and comfortable essential. The product is under the W Sustain category as it is made of sustainable materials.