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Copper Ratio Sweatshirt S-5XL — Numeric Math Pi-Style Design

$18.14

Sizes: S

Colors: Black

Quantity

30 days return policy.

About the product

This crewneck carries a quiet geometry nerd energy — a soft, mid-weight sweatshirt printed with the digits of the Copper Ratio across the chest. It feels like slipping into a late-night study session or settling into a café with a notebook. The clean white lettering on deep black keeps the look minimal and smart. Wear it when you’re solving problems, teaching, or simply want a subtle nod to math and science culture. The tubular knit and ribbed collar keep the shape cozy and structured. Small embroidery placements are available for a personalized touch on the chest or wrists.

Product features
- Medium-heavy 50/50 cotton-poly blend (8.0 oz/yd²) for warmth and durability
- Tubular knit construction without side seams for a smooth fit
- Ribbed knit collar with seam and double-needle stitching for shape retention
- OEKO-TEX® certified dyes and ethically grown US cotton; meets safety and chemical standards

Care instructions
- Machine wash: cold (max 30C or 90F)
- Non-chlorine: bleach as needed
- Tumble dry: low heat
- Do not dryclean
- Do not iron

Without side seams

Knit in one piece using tubular knit, it reduces fabric waste and makes the garment more attractive

Ribbed knit collar with seam

Ribbed knit makes the collar highly elastic and helps retain its shape

Embroidery

Embroidery decoration method available on either left chest, center chest, or large center chest, as well as right + left wrists

Age restrictions

For adults

Other compliance information

Meets the flammability, lead, cadmium, bisphenols and phthalates level requirements.

Country of origin

Made in Nicaragua

DTF inner neck labels

The inner neck labels and wrist prints are printed using the Direct-to-Film (DTF) print method, while the rest of the prints are done with the Direct-to-Garment (DTG) method.

Do not dryclean; Do not iron; Machine wash: cold (max 30C or 90F); Non-chlorine: bleach as needed; Tumble dry: low heat.

Accurate shipping options will be available in checkout after entering your full address.

Any goods purchased can only be returned in accordance with the Terms and Conditions and Returns Policy.

We want to make sure that you are satisfied with your order and we are committed to making things right in case of any issues. We will provide a solution in cases of any defects if you contact us within 30 days of receiving your order.

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Charlotte Place Design is an ecommerce print-on-demand retail shop operating through a Printify Pop-Up Shop storefront. Order fulfillment is supported through Printify’s production and delivery infrastructure. Printify is one of the largest print-on-demand groups globally, providing services for, amongst others, Etsy customers. At present the urls charlotteplacedesign.com, charlotteplaceart.com, CPDesign.com all point to this site.

and Christopher Fayers