Dear Sir/Madam,
Thank you for visiting TREE Design.
A blue or a purple marks on the products are marked when working on tailoring(cutting) and sewing.
The marks are displayed using a special pen.
The special pen has properties that the marks are erased by heat.
And the special pen has properties that the marks reappear at below-freezing temperatures.
There are no marks when inspecting the product, but the marks may reappear.
Because the products may be placed at below-freezing temperatures during delivery.
If the marks reappear, you can easily erase the marks by applying heat. Please try a iron or a hair dryer.
If you try it, you will find that the marks are easily erased by heat.
We hope you are all staying safe and healthy.
Best regards,
TREE Design
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