For cooling comfort...wear around your neck or as a headband. Provides cool comfort 24 to 48 hours. Super absorbent acrylic polymer activates easily and quickly when soaked in cold water for 15 to 20 minutes. Lightweight, comfortable cotton construction provides all day comfort anywhere heat slows you down. Reusable, just resoak. Ideal for all warm weather. Helps workers stay cool, fights fatigue, and increases productivity. One size fits all.