【Optimal Heating Zones】A Silk exterior, flat design, and expanded size ensure this heated eye mask rests right on your eyes to keep soothing heat last for relieving tiredness, dry eyes and tensions.【Temperature & Timer Setting】Featuring 4 heat levels from 35℃ with up to 50℃ and 4 timer settings for automatic shut-off from 10min to 30min, this hot eye compress allows you to customize your own eye SPA for sleep satisfaction.【Adjustable Strap】Upgraded with a larger size, the elasticated band and the small plastic buckle on it help create a comfortable fit for various face shapes and secure the eye mask in place. Plus the enlarged nose gap, the usb eye mask can shut out unwanted light for a daytime nap.【USB-Powered】Compatible with most 5V.