If a "Buy 3, Get 1 Free" sale isn't active, you can still get similar value through these permanent options:
Thorlo offers Sock Value Bundles with built-in savings: 3-Pack Bundles: Often provide up to 10% off . thorlo buy 3 get 1 free
Typically follow a "Pay for 5, Get 1 Free" structure (approx. 17% savings). If a "Buy 3, Get 1 Free" sale