Extension damage happens when too much weight attaches to too few natural hair strands, causing traction alopecia. Tape-ins use adhesive requiring solvent removal and slip in humidity, lasting 6-8 weeks. Fusion creates 100+ pull points with heat bonds that damage during removal. Hand-tied weft methods distribute weight across approximately 30 linked attachment points spanning entire rows, eliminating concentrated tension while lasting 7-10 weeks between adjustments.
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