When selecting adult furniture, structural integrity and weight capacity are the most critical factors. Ensure the frame is made of reinforced steel or high-density solid wood capable of supporting at least 250kg to 300kg of dynamic weight. For upholstery, prioritize medical-grade PU leather or high-quality PVC, which are hypoallergenic, sweat-resistant, and easy to sanitize with standard disinfectants. Additionally, check for high-resilience flame-retardant foam (meeting CA117 or BS5852 standards) to ensure both comfort and safety.