To keep your bone straight or raw curly hair looking fresh and healthy, always handle it gently. For bone straight hair, use lightweight serums, avoid heavy oils, and wrap your hair at night with a silk or satin scarf to maintain sleekness. For raw curly hair, detangle when wet, use moisturizing products, define curls with leave-in conditioner, and avoid rough towel drying to prevent frizz. Wash your hair moderately, deep condition regularly, and always protect it from heat and harsh handling to keep your strands soft, shiny, and long-lasting.