Hair Extensions 101: Key Terms Explained (Remy, Weft, Single-Drawn)
TL;DR: Hair extensions add length/volume using formats like clip-ins, tape-ins, beaded rows (sew-ins), fusion tips, I-tips/nano, and halos. Key choices: hair quality (Remy vs non-Remy), weft type (machine/hand-tied/skin), and density (single- vs double-drawn) matched to your hair and maintenance goals.
What are hair extensions?
Extensions are attached hair used to add length, fullness, or color. Common lengths: 12–26 in in 2-inch steps. Sets are sold by grams and piece count. At-home systems: clip-in, halo. Professional: tape-in, sew-in/beaded row, fusion/keratin tip, I-tip/nano. Choose based on install method, lifestyle, budget, and maintenance.
What does “Remy” mean?
Remy: cuticles intact and aligned → less tangling, better shine/longevity.
Non-Remy: mixed/reversed cuticles; often acid-washed/silicone-coated to feel smooth initially.
Virgin = unprocessed hair (can be Remy or not). Remy generally outlasts non-Remy, especially with heat styling.
What is a weft?
A weft is a stitched/bonded track of hair used in rows.
Machine weft: thicker seam; can be cut to width; common in sew-ins/beaded rows.
Hand-tied: ultra-thin/flat; do not cut across knots.
Skin weft: scalp-like ribbon (often in tape-ins) for a very discreet look.
Single- vs double-drawn
Single-drawn: natural taper; lighter feel; cost-effective; good for fine hair.
Double-drawn: strands sorted to target length; fuller ends; denser look with fewer pieces; often higher grams and price.
Lifespan by type
Longevity varies by quality, install, and care. Clip-ins/halos can last many months to 1+ year since they’re not worn 24/7. Semi-permanent methods need move-ups as hair grows. Remy typically lasts longer and styles better than non-Remy.
Comparison Table
Type Install Time* Move-Up/Maintenance Hair Lifespan** Reusable? Typical Weight/Count Notes Clip-In 10–20 min (home) None; remove daily 6–12+ months Yes 120–220g; 5–10 pieces Fastest transformation; flexible styling Halo 5–10 min (home) None; remove daily 6–12+ months Yes 100–180g; single band Gentle; minimal pressure Tape-In (Skin Weft) 45–90 min Move-up 6–8 weeks 3–9+ months Yes (re-tape) 80–200g; 20–40 sandwiches Very flat; oil-aware care Sew-In/Beaded Row 60–150 min Move-up 6–10 weeks 6–12+ months Yes 60–200g; 1–3 rows Hand-tied or machine wefts Fusion/Keratin Tip 120–240 min 8–12+ weeks; reinstall 3–6+ months Typically no 80–150g; many small bonds Low-profile; meticulous removal I-Tip/Nano 120–240 min Move-up 6–10 weeks 6–12+ months Yes 80–150g; 100–200 tips Strand-by-strand; very discreet
*Install times assume a trained pro for salon methods and a practiced user at home.
**Lifespans assume Remy human hair with gentle, sulfate-safe care, heat protection, and minimal chlorine/salt exposure; actual results vary.
How to choose grams/density
Fine hair: 80–120g, single-drawn/lightweight; avoid bulky roots.
Medium hair: 120–180g for balanced fullness/length.
Thick hair or big length jumps: 180–220g+ or extra wefts/rows; double-drawn for full ends.
Pick length first (12–26"), then add grams for fullness—longer lengths often need more grams to keep ends full.
Related terms (quick definitions)
Virgin hair: never chemically processed; may be Remy if collected aligned.
Density/grams: total set weight; higher grams = more fullness (esp. at ends).
Shade codes: brand color IDs; may include root (R), balayage/ombre (B/O), blend notes.
FAQ
Will double-drawn always look better than single-drawn?
Double-drawn gives fuller ends and a premium look, but single-drawn can be perfect for fine hair thanks to its lighter, natural taper. Choose based on your density, desired finish, and comfort.
How many pieces do I need for clip-ins or rows?
Typical clip-ins: 5–10 pieces (e.g., one 8", two 6", several 4–1.5"). Fine hair may use fewer; thick hair often uses all. Rows: 1–3 rows totaling 60–200g, depending on head size and volume goals.
What length should I pick for everyday wear?
Subtle daily boost: 12–16". Noticeable glam: 18–22". Dramatic: 24–26" (usually needs higher grams and more upkeep).
Care tip: Gentle brushing from ends up, heat protectant, and avoiding oils at attachment points extend lifespan. Sleeping with wet hair or excessive heat shortens wear time.
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