This Karrimor 3-in-1 jacket requires no complex setup. Simply zip the inner fleece into the outer shell when combined protection is desired, or wear each component separately as needed. The zippers and attachment loops (if present, Info needed: confirm attachment method) are designed for easy integration. Compatibility: This jacket is designed for adult males (size M) and is a standalone outerwear piece. No specific external compatibility is required. Care Instructions: To maintain the performance and longevity of your jacket, always refer to the care label inside the garment. Generally, the jacket is machine washable. Use a mild detergent designed for technical outerwear and avoid fabric softeners, as these can degrade the waterproof and breathable coatings. Wash on a gentle cycle with cold water. It's crucial to keep away from fire due to the materials used. Air dry your jacket thoroughly, avoiding direct heat, to preserve the waterproof membrane.