Robust cooling pad Reliable gel technology supports eco-friendly repeated use. Long lifespan with minimal replacements for hats of all kinds. Effective heat protection Provides constant cooling to support outdoor adventures, reduces heat stress during sports, and delivers noticeable relief. Wide adaptability Flexible integration allows seamless fit on baseball caps and sun hats without modifications, and reliably adapts to helmet and cap shapes for comfortable wear. Efficient cooling performance Delivers rapid cooling after fridge storage; the cooling gel insert ensures long-lasting comfort by quickly dissipating body heat. Use scenarios - Outdoor activities in hot weather (hiking, cycling, running) where you wear a cap and need continuous cooling. - Sports practice or outdoor work involving helmets or caps, helping to manage heat buildup. - Daily use in warm climates, easily switching between different hats without tools or alterations.