Back material: Rattan; Seat material: Foam+Rattan No assembly: This chair set comes ready to use straight out of the box. No assembly is required. Birch wood: This chair set offers birch wood frames for a tough and sturdy structure. This solid wood structure makes these chairs highly durable and stylish Vintage inspiration: from slender concave chair legs to an iconic rounded backrest and seating, this chair set offers a vintage style for your home. The elegant curves of this set bring your home together with a classic touch.