The English prefix "Tri-", derived from both Latin and Greek roots, means THREE. Trilogy Hair is a 100% Virgin Hair company that focus on meeting your extension needs as wells as providing you with the BEST "Three Bundle Deals" in the world. Each and every cuticle is intact with natural look to top it all off. We have done many test on our hair and we can honestly say that applying heat, as well as chemical isn't a problem with this collection. Available in Natural off-black (1B) & Russian Blonde, each bundle weigh anywhere from 3.5 - 3.7 oz. which is about 100 grams. Each lace front and full lace are 150% density. Meeting all your quality needs, I am honored to introduce to you our luxury extensions and wig line.