Features: High-quality materials: The outer layer is made of TPU polymers rubber material, which has high elasticity, high toughness, and high waterproof properties, making the neck rings fully stretched and less prone to bubbles and breakage, making daily wear more comfortable. Comfortable to wear: It adopts ergonomic design. The volume, weight and material of the cooling neck rings have been repeatedly considered and verified to minimizes neck pressure. It is very cool and comfortable to wear without any sense of oppression. Reusable: The soft cooling neck rings can be placed in the refrigerator and reused, providing rapid cooling to help eliminates summer heat and relieve discomfort. Portable: The cooling neck rings is compact and lightweight, making it ideal for travel or on-the-go cooling needs in hot summer months. Versatile: Suitable for a variety of occasion from outdoor activities to indoor relaxation, such as outdoor activities in hot weather, sports, cycling, hiking and camping, etc., providing a universal cooling effect. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: TPUPCM-material Size: 16*13*2.2cm Melting point: 28°C Freezing time: 15-20 minutes in the refrigerator Purpose: Cooling and relieving dryness and heat Note: natural crystallization below 28°C Package List: 1 x Fast Cooling Ice Rings for Neck