ONE SIZE FITS MOST：The underscarf hijab cap measures about 11.6 *10.15 incheFeatures an adjustable tie-back design for a customized and secure fit, combining practicality with trendy fashion elements.; This innovative design keeps the hijab undercap firmly in place during daily activities, walks, or light movements, preventing slippage and constant readjustments; It simplifies your hijab styling routine, saving time while ensuring the polyester undercap stays put to cover your hairline perfectlyClassic Black White Muslim Hijab Undercaps: this set includes 2 adult-sized Muslim undercaps for hijab no slip in black and white, timeless colors that pair seamlessly with any outer hijab or outfit; The interchangeable Polyester hijab caps allow for easy rotation, ensuring you always have a clean undercap ready; Whether for casual daily wear or formal occasions, these classic-colored milk silk undercaps complement every wardrobe, making them a must-have for Muslim womenVersatile & Easy to Match：designed for adult head sizes, this hijab scarf for women offers full coverage of hair, ears, , creating a smooth, wrinkle-free base for your hijab; The stretchable polyester fabric adapts to different head shapes, providing a snug yet comfortable fit without feeling tight; Beyond hijab use, this versatile undercap can also serve as a neck gaiter, night hair wrap, or modesty layer for sports and travelEASY TO WEAR: It's easy to use the inner caps, you can hold your hair together, put it in the hijab cap and tie two strings to fix it, which can stay for a long time and will bring you great convenience.WIDE OCCASIONS: This Under cap for hajib is suitable for various occasions in daily life, you can wear the undercap for work, going out, , outdoor activities, parties, trip, cooking, sleeping, yoga, gym and so on, making your life more convenient.