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Heat prevention sheet for heatstroke prevention. New, unused, unopened.
Product Details
Protect your head from the sun's heat!
Simply place the cute four-leaf clover sheet inside your hat or helmet to prevent radiant heat from the sun.
To use Netsu Bōshi, position the reflective side outward and the moisture-permeable waterproof sheet towards your head inside the helmet.
Radiant heat from the sun is absorbed by the helmet's material, but Netsu Bōshi, with its 98% reflectivity, blocks and releases secondary radiant heat, the primary cause of heat, back outside. For hats, Netsu Bōshi, with its 98% reflectivity, reflects radiant heat that has passed through the hat's material back into the atmosphere, significantly reducing the amount of heat transferred to your head. Furthermore, it cuts 98% of UV rays that pass through the hat and reach your head, making it safe for children with sensitive skin.
Daily Cleaning: Use a soft brush or damp cloth to gently wipe away dirt. Avoid harsh chemicals. For mesh areas, use diluted mild detergent and a soft brush.
Drying: Air dry in a cool, shaded place after cleaning. Avoid direct sunlight or high heat, which can cause fading and glue deterioration.
Storage: Stuff with paper to maintain shape when not in use. Store in a dry, ventilated area to prevent mold. Rotate between multiple pairs to extend lifespan.
Usage Notes: Designed for basketball. Not recommended for hiking, long-distance running, or other specialized sports where different performance features are required.




