Optrex warming eye mask 2 single use warming eye masks relieves and relaxes tired eyes in just 10 minutes fragrance free with microsteam technology optrex warming eye mask are air activated and start to warm up instantly when opened the microsteam technology delivers a gentle warming steam that is designed to moisten and soothe tired eyes air activated self heating masks single use disposable masks designed with straps to allow mask to fit securely over your eyes