Spiral College

Design: Spiral and Heart

The spiral pattern in the front results from simple trigonometric functions and the heart-pattern in the back is created by iterating the famous John Conway's Game of Life with a custom-initialized starting grid.

Sweatshirt: Eco Sweatshirt (unisex) by Stanley/Stella. The premium college is made with durable and soft organic fair-trade cotton.

• High quality: 100% combed ring-spun cotton. Combing removes shorter cotton fibers that can cause lint and uneven textures, leaving only the long, strong fibers. Ring spinning then twists and aligns these fibers into a fine, tight yarn. Ring spinning takes more time than alternative spinning methods but produces stronger and softer cotton.

• Fair labor standards: Stanley/Stella produces the shirts in Bangladesh in selective partner factories, while actively monitoring fair working conditions. Stanley/Stella upholds supply chain transparency and takes part in an external auditing system by Fair Wear Foundation.

• Organic: The cotton is grown without synthetic pesticides, fertilizers, or GMO seeds. This helps to protect the soil, biodiversity, and farmer health, while also reducing water use and emissions. The cotton has organic certificates (GOTS and OCS, OEKO-TEX Standard 100), and it is PETA-Approved Vegan.

• Sizes: See the size table below in cm. The sizes correspond to a smaller size in the US market, so US customers should order a size up.

• Thick fabric:  350 g/m² (10.3 oz./yd.²). 1×1 rib at neck collar, sleeve hem, and bottom hem. Double-needle topstitch at the neck collar, on the sleeves, and on the bottom hems. Inside herringbone back neck tape. Self-fabric half moon at back neck.

• Traceability: Weaving, dyeing and manufacturing in Bangladesh. Contains 0% recycled polyester or hazardous substances.

• Safety: Printful ensures compliance with EU product safety standards in compliance with the General Product Safety Regulation (GPSR), including the EU REACH requirements.

This product is made to order to reduce overproduction. For this reason the delivery to an EU-country takes typically 1-3 weeks. Thank you for making a thoughtful purchasing decision!

Quality guarantee: If there’s ever an issue with the print or quality of your item, we’ll send you a free replacement or give you a refund.

For any inquiries or refund requests due to quality issues, please contact us at info@shoprtist.com. Please note we do not refund buyer's remorse.

Size guide