Get 10% off orders up to $100; 15% off orders between $100 and $200; and 20% off orders over $200. No code needed. Cannot be combined with other offers. Offer valid 6/21 & 6/22. Get 10% off orders up to $100; 15% off orders between $100 and $200; and 20% off orders over $200. No code needed. Cannot be combined with other offers. Offer valid 6/21 & 6/22.

What are "dye lots" on yarn labels?