[Sufficient Quantity]: This set contains 50 pieces of hat liners for caps, 28 x 7cm/11 x 2.8in. Sufficient quantity to meet daily use and replacement, keeping you fresh and dry. The hat liner is ultra-soft, ultra-thin, breathable, comfortable to wear, and lightweight for easy portability and storage. [Sweat-Absorbent and Stain-Blocking]: The sweat guard for hats has good sweat absorption capabilities, keeping sweat away from your eyes and leaving you feeling refreshed. At the same time, it blocks makeup such as foundation and sunscreen, as well as grease and stains. Replace the liner with a new one after use, no cleaning required. [Collar Protectors for Shirts]: Our hat sweat bands can also be used as collar protector pads to absorb sweat from the neck, keeping the neck clean and dry all day long, without worrying about the collar turning yellow, easy to clean, and suitable for shirts and polo shirts. Invisible design keeps you dry and stylish. [Peel and Stick]: The self-adhesive hat stain protector is easy to put on, just peel off the backing and stick it to the brim or collar. These hat sweat liners are constructed to fit the brim or collar and won't easily shift or fall off. Removal and replacement are also easy and leave no residue. [Wide Range of Uses]: The sweat band for hats is perfect for various hats, such as baseball caps, tennis caps, golf hats, wide-brimmed hats, sun hats, hockey helmets, etc. It is ideal for sports enthusiasts, outdoor workers and athletes, etc.