UltraNet High-Visibility Head Net の説明 from Ben's
Ben's UltraNet Head Net takes insect protection to the next level with a comfortable, form fitting design that keeps even the tiniest insects out, allowing you to enjoy your adventure without fear of no-see-ums, midges, black flies, and other biting insects. With the highest visibility of any no-see-um net on the market, the UltraNet lets you enjoy spectacular views while keeping your head and neck safe and bite free. The head net's pores are only 0.5 mm, making them impenetrable to no-see-ums or other tiny bugs you may encounter, whether you're hiking, fishing, or gardening. The clever design includes under-arm straps that seal out bugs around your chest, allowing you to unzip your shirt or jacket without losing your bug protection. In a pull string sack for safe storage, Ben's UltraNet is engineered for a comfortable, roomy fit with an elasticized crown that will keep the head net in position on your head, fishing hat, or favorite baseball cap, keeping you bite-free wherever your adventures take you.
Drawstrings create certain risks when not used properly.