1. Hat Cords & Waist Cords are functional cords designed for adjusting hat size and securing waistlines, respectively.
2. Materials include polyester/nylon (durable), lightweight (no discomfort), adjustable length (via cord locks), and anti-slip ends.
3. Baseball caps, hoodies (hat cords), casual pants (waist cords), and sportswear (adjustable waistbands).