This Merino wool, full zip jumper from Polarn O. Pyret is ideal for keeping cosy. Smooth on the outside with soft terry on the inside, the internal looped fabric allows air to circulate and gives this jumper a warmer, thicker feel. Merino wool is naturally breathable so any excess heat or moisture is released, keeping them comfortable all day long without overheating. It's also naturally stain resistant, antibacterial and hypoallergenic.