Great for : 1.Exercise & Fitness 2.Hot Day on the Job 3.Outdoor Recreation 4.Gardening &Yard Work 5.Adults &kid No fans no refrigeration no batteries Function: 1. [EASY TO USE]You only need three steps to feel cool : Wet it - Spray or soak in water, slip it on around your neck, and feel cool. Say no to fans, batteries or refrigeration like old versions 2.[PORTABLE]Can be worn while performing activities especially outdoor, relaxing or sleeping. You can lower heat of your body while running, hiking, gardening or cycling. 3. [BEST VALUE] Dry, odourless, natural filling uniformly releases maximum cold for 60 minutes 4.[ PROMPT COOL FEELING]Delivering exceptionally comfortable cooling when applied directly to bare skin, which gives you pleasure when doing activities.