Relief Meets Relaxation: Experience long-lasting relaxation and gentle relief from stress and soreness while reducing discomfort around your head and eyes. Hot and Cold: Place the sleeve in the freezer for up to 2 hours for cold therapy or heat in the microwave for 30-40 seconds to enjoy up to 15 minutes of soothing heat. (the choice is yours). Pillow-Friendly Fabric: Finished with a soft-touch fabric, this head sleeve is smooth, comfortable, and contoured to soothe you into slumber at bedtime. Contoured Hydrogel Design: Filled with flexible hydrogel, the head sleeve gently molds to your head, eyes, and ears, providing targeted relief and relaxation without restricting movement. One Size Fits Most: With a stretchable, contoured design, the Homedics Hot and Cold Gel Head Sleeve provides a comfortable, secure fit for a variety of users.