Essential hat accessories for baseball enthusiasts, frequent travelers, and anyone who value organized hat storage and hat shape preservation insert the hat shaper into any baseball caps size and fold edges for instantly structural – making it great for hat restoration project and daily wear maintenance Crafted from flexible polyester felt, these light weight baseball hat shaper ensures optimal air flowing to keep headwear comfortable while buildup Keep your baseball caps in perfect shape with this 20 pieces set of breathable polyester hat shapers, designed to maintain structure during storage, travel, or daily use Use these baseball hat shape maintainers to protect your collection in closets, suitcases, or backpacks while commuting, vacationing, or displaying hat as decoration