Woot offers (2-Pack) OlaplexNo. 4 Bond Maintenance Shampoo, 250ml/8.5 oz for $39.99 (orig. $64.00) + free shipping with Prime.

Product Description:
The Original Bond BuilderThe only patented system to noticeably repair extreme damage—turn dry, brittle hair into soft, shiny, and more resilient hair. 
Highly Nourishing & Reparative
No. 4 Shampoo repairs and protects hair from everyday stresses — including damaged hair, split ends, and frizz — by re-linking broken bonds.
How it WorksA single molecule, free of silicones and oils, dramatically improves the hair strength, protects from within, and provides immediate results.

Made to work on all hair types
From curly hair to stick straight, Olaplex is suitable & beneficial for all hair types.

• It is formulated with olaplex bond building chemistry
• It restores internal strength and moisture levels to add incredible shine and manageability
• It is recommended for all hair types