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Sundercover™ hat liners come in 3 sizes and 2 shapes. The Round Liner is for fitted baseball caps, fedoras, bucket hats, women’s sun hats, etc. With it's adjustable rim, it comes in a single One Size Fits Most (OSFM).


The Cap Liner is one shaped for adjustable baseball caps with an exposed opening in the back. (This liner can be used in other hats, although it’s sun protection will be limited to the area covered by the liner). This hat liner is available in the following 3 sizes:

One Size Fits Most (OSFM) - As the size suggests, this liner fits in most adult OSFM hats. Approximately 21”- 24” head circumference. 


Large/Extra Large (L/XL)-  This liner fits in larger-sized men’s hats. Approximately 23"-25" head circumference.

Small/Youth/Toddler (S/Y/T)- This size fits best in women’s small, youth and toddler hats. Approximately 18”-21” head circumference.

Infant and L/XL adult sizes to come!

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