These U-tip hair extensions are crafted from premium Remy human hair, offering a natural look and feel that blends seamlessly with your own hair. Each pack contains 25 individual strands totaling 25 grams, available in 14 to 22 inch lengths. The pre-bonded hot fusion keratin application method provides secure attachment without requiring heat, glue, or sewing during installation. The extensions can be styled similarly to your own hair, though heat styling should be kept below 180 degrees Celsius.