With the perfect mix of cotton and polyester (80% cotton & 20% polyester). This means they’re super-soft, breathable and incredibly comfortable to wear. The cotton enhances breathability while the polyester helps reduce shrinkage, retain shape and reduce creasing. Longer lasting and now low pill, they’re super easy to care for – simply wash & wear!And when it comes to quality you can feel for yourself, we’ve increased the fabric weight for added warmth and comfort, so the kids can really snuggle into them.