YoungSee I-Tip Hair Extensions are installed strand by strand using beads, requiring no glue or heat. They cause minimal damage to natural hair, are safe and gentle, and offer 360-degree rotation for unparalleled flexibility. These semi-permanent extensions are highly favored for their natural appearance, silky texture, comfortable wear, and rich content of high-quality keratin. Product Details TYPE: Pre-Bonded Hair Extensions (100% Virgin Human Hair) COLOR: Photographed from the actual product, but the color may vary slightly due to lighting, angle, and monitor settings. WEIGHT: 0.8g/strand, 20g/pack,100-150g for a full head LENGTH: 14"-24" SETTING: Can be washed, dyed, cut, styled and curled TEXTURE: Natural straight, with a natural wave when wet or left to air dry or diffused. INSTALLATION: Bead Application LIFESPAN: 6-12 months How many packs do I need? Minimum 5-7 packs Medium Hair 8-10 packs Thick Hair 11-13 packs