[Safe Material] Latex free BPA free phthalate free eye coolers made of high quality eco friendly PVC pressure tested with a strong leak proof seal. Control the cooling time according to the desired effect. If it takes too long it will freeze and harden preventing the desired effect. [Application and Effectiveness] Hot and cold gel eye masks can reduce eye swelling puffiness and muscle pain relieve stress improve sleep and enhance eye care. The open decompression design is suitable for use at work for your eyes and at bedtime. [Warm Compress Method] Heat the eye mask in the microwave for 10 seconds (medium to low setting). You can extend the heating time but do not set it for 1 to 2 minutes at a time. Due to varying microwave power the heating time can be adjusted accordingly but the heating time should not be excessive to avoid damaging the product. [Reusable] The cooling eye mask is filled with polymer gel which offers good thermal insulation high fluidity and is soft and skin friendly. The ultra soft plush fabric is safe colorfast and comfortable. [2 Cold Compress Methods] (1) Place the cooling gel eye mask in a cooler for 30 60 minutes remove it rub it with your hands and place it in a bag once it reaches a comfortable temperature. (2) Place the cooling gel eye mask in a cooler for 15 30 minutes remove it rub it with your hands until it reaches a comfortable temperature and then place it in a bag for use. 2 Eye Masks Details Dimensions H x W: approx. 10 x 21 cm Material: gel plastic (PVC) polyester fiber. The ice gel eye mask relieves eye problems. The gel beads retain temperature well and are very fluid. The adjustable elastic straps easily adapt to different head sizes and can be used in other locations. The soft fabric is very gentle and provides a comfortable experience. Free yourself from tension.