No complex setup is required for this pyjama set. Simply remove it from its packaging, and it's ready to wear. For compatibility, ensure the chosen size (15-16 years in this instance) matches the wearer's measurements by consulting the detailed size chart typically provided in the product images. Care Instructions: To maintain the softness, color, and integrity of the 100% cotton fabric, proper care is essential. - Washing: Machine wash cold with similar colors on a gentle cycle. Using a mild detergent is recommended. - Drying: Tumble dry on low heat or, for best results, hang to dry. High heat can cause cotton to shrink and potentially damage the print. - Bleaching: Do not use bleach, as it can damage the fabric and fade the printed design. - Ironing: Iron on low heat if necessary, always avoiding direct contact with any printed graphics to prevent damage. Iron the garment inside out if possible. - Storage: Store folded in a cool, dry place to maintain its shape and freshness.