1. How long do they last? 1-3 years with proper care. 2. Can I sleep in them? Possible but not recommended, remove before bed to prevent breakage. 3. Can I curl or straighten them? Yes, 100% human hair will be able to use heat. Use heat protectant. 4. Will they damage my hair? Not if worn correctly and removed gently. 5. How many do I need? 1 set comes with 6 pieces, I recommend 2 sets if you have short or thin hair. 6. Do I need to wash them often? I recommend washing them every 4–5 wears. Adjust as needed TAPE-INS 7. How long does an install last? 6–8 weeks per install. Hair can be reused 2–3 times. 8. Can I install them myself? It’s best to get a pro install for proper placement. 9. Will they damage my hair? No if installed/removed properly and not pulled. Please give yourself breaks in between 10. Can I use heat tools? Yes, but avoid heat near the tape tabs. 11. How many do I need? 60-80 pieces for a full look. 12. Can I swim in them? Yes! Tie hair up & deep condition after swimming.