Frequently Asked Questions
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Sizing
How do I find my size?
How should an undershirt fit?
Our undershirts are intended to fit snug for an invisible look when worn under outer layers. If you prefer a non-fitted style, we recommend sizing up.
Product & Fabric Info
How do i care for my products?
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Do your products contain PFAS?
No, all of our products are made PFAS-free. However, PFAS is transferable through other interactions a garment may have with contaminated sources. So while our items are made PFAS-free, we cannot guarantee they stay that way throughout their use.
What is your Sustainable Silk™ made of?
Our Numi undershirts are made of 69% Naia™ Acetate and 31% Silk. If you’d like to learn more about our fabrics, please visit our Materials page.
What makes your Sustainable Silk™ stain-resistant?
Our silks are stain-resistant because they are treated with Schoeller's bluesign® certified stain-resistant technology. This treatment creates a protective barrier on the surface of the silk fabric that repels liquids, dirt, and stains. The bluesign® certification ensures that the technology is environmentally-friendly, using sustainable and safe methods and materials.
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