Hot or Cold therapy for your aching neck. The flexible body conforming Neck Wrap has a glycerin/water-based gel that brings soothing comfort to the tension areas of your neck. Freeze 30 minutes for cold therapy or microwave 2 minutes for heat therapy. Secures with Velcro straps for freedom of movement and thorough contact. Special non-toxic solid gel cannot leak and is covered with a washable cotton twill fabric. Made in the USA.