* Neck Ring Cooling Case * Keeps neck rings cold. Cool for approximately 8 hours when carried. * *1 Includes a keep-cool ice pack (please freeze before use). * *1 When a frozen neck ring is placed inside this product with a frozen ice pack, and the zipper is closed, it maintains a temperature of approximately 28°C or lower for 8 hours in a 36°C environment. * Enhanced cooling effect! Less condensation! * Double Russell mesh + aluminum vapor deposition * Compatible with neck rings in sizes M and L. Color: Blue Gray Material: Polyester Used about 3 times.