Bobbi Boss premium hair retails around $100 and Up, per pack. The Longer the hair the more it will cost. I purchased mine off ebay.com and got a great deal. Also check out Myremy.com for all Remy hair deals.
Tools needed are: Old Towel, Brush or Comb, Weft Sealer... patience and time.
To seal your Wefts, lay the extensions over a old towel. Paint the weft sealer ONLY onto the weft. Be very careful not to get any on the hair, as this will cause tangles. Let each section dry and move to the next. Then Flip the extensions over and repeat. This was a slightly long and tedious process but its worth it to keep your extensions looking full and luscious.
I love this weft Sealer because it did not leave a thick, white or caked film on the weft . They still are thin and smooth and ready for my installation.
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