https://shirtcastle.com/blogs/science/is-viscose-a-natural-fiber 2026-02-23T22:35:50-05:00 weekly https://cdn.shopify.com/s/files/1/0727/5344/7108/articles/BLOG_-_VISCOSE_featured.jpg?v=1771904150 Why Viscose Is Not a Natural Fiber An old postcard shows an aerial view of a viscose manufacturing plant in virginia https://shirtcastle.com/blogs/science/is-rayon-a-natural-fiber 2026-02-25T00:05:56-05:00 weekly https://cdn.shopify.com/s/files/1/0727/5344/7108/articles/rayon_not_a_natural_fiber.webp?v=1771995956 Why Rayon Is Not a Natural Fiber black and white infographic about rayon https://shirtcastle.com/blogs/science/is-modal-a-natural-fiber 2026-02-26T17:27:02-05:00 weekly https://cdn.shopify.com/s/files/1/0727/5344/7108/articles/MODAL.webp?v=1772144822 Why Modal Is Not a Natural Fiber https://shirtcastle.com/blogs/science/is-linen-a-natural-fiber 2026-02-26T13:47:11-05:00 weekly https://cdn.shopify.com/s/files/1/0727/5344/7108/articles/Breaking_FLAX_c083a657-ad08-4f29-8e67-98ec47fc8fa8.webp?v=1772131631 Linen Is a Natural Fiber & Has Been Used for 30,000 Years a woman breaking flax in russia https://shirtcastle.com/blogs/science/is-tencel-lyocell-a-natural-fiber 2026-02-26T17:26:25-05:00 weekly https://cdn.shopify.com/s/files/1/0727/5344/7108/articles/lyocell_infographic.webp?v=1772144785 Why Tencel (Lyocell) Is Not a Natural Fiber a black and white infographic describing Lyocell's manufacturing and properties https://shirtcastle.com/blogs/science/is-nylon-a-natural-fiber 2026-02-26T13:32:00-05:00 weekly https://cdn.shopify.com/s/files/1/0727/5344/7108/articles/nylon_microplastics_lung_damage.webp?v=1772130720 Nylon Is a 100% Synthetic Fiber A black and white ShirtCastle infographic depicting the science of Nylon microplastics releasing chemicals in the lungs that genetically inhibit proper cell growth https://shirtcastle.com/blogs/science/microplastics 2026-02-23T21:41:54-05:00 weekly https://cdn.shopify.com/s/files/1/0727/5344/7108/articles/microplastics_infographic_final.webp?v=1771900914 Microplastics, Polyester Clothing & Human Health A black and white line-drawing infographic about polyester clothing shedding microplastics into indoor air and contaminating the human body https://shirtcastle.com/blogs/science/what-is-ring-spun-cotton 2026-02-26T16:59:09-05:00 weekly https://cdn.shopify.com/s/files/1/0727/5344/7108/articles/ring-spun_cotton_infographic.webp?v=1772143149 Ring-Spun Cotton Explained A black and white. infographic showing the process and science behind ring-spun cotton versus conventional cotton https://shirtcastle.com/blogs/science/what-is-combed-cotton 2026-02-26T16:43:46-05:00 weekly https://cdn.shopify.com/s/files/1/0727/5344/7108/articles/combed_cotton_ingraphic.webp?v=1772142226 Combed Cotton Explained An infographic distinguishing the manufacturing process of combed cotton, also showing the positive properties of combed cotton, especially as those benefits pertain to the kind of printed shirts sold at ShirtCastle https://shirtcastle.com/blogs/science/human-toroidal-field 2026-08-20T22:02:11-04:00 weekly https://cdn.shopify.com/s/files/1/0727/5344/7108/articles/human_toroidal_field_blog_0d8cea18-645a-40f9-b6c3-fca864b9e3ef.webp?v=1787277731 Human Toroidal Field: The Science A black and white vintage-style drawing diagramming the human toroidal field, a donut-shaped magnetic field generated by the human heart https://shirtcastle.com/blogs/science/what-is-merino-wool 2026-08-26T15:41:55-04:00 weekly https://cdn.shopify.com/s/files/1/0727/5344/7108/articles/merino_sheep_f805d1a8-9646-43c8-9dd2-b5c48b1041bc.png?v=1787773315 What is Merino Wool? The Science Behind the Performance a drawing of a merino sheep https://shirtcastle.com/blogs/science/merino-wool-survival-tales 2026-08-26T19:14:49-04:00 weekly https://cdn.shopify.com/s/files/1/0727/5344/7108/articles/fienes_stroud_9965457e-5e44-4c84-b3c0-fb92944e25d3.jpg?v=1787786089 5 Times Wool Clothing Saved Someone's Life drawing of two men dragging sleds across snowy landscape wearing wool clothing https://shirtcastle.com/blogs/science/anterior-midcingulate-cortex-function-willpower 2026-09-09T17:46:49-04:00 weekly https://cdn.shopify.com/s/files/1/0727/5344/7108/articles/build_will_empty_room.webp?v=1788990409 The Anterior Midcingulate Cortex: Where Your Brain Physically Builds Will a man seen form behind wears a black t shirt with white Build Will graphic highlighting the anterior mid cingulate cortex, an area of the brain that grows when you do hard things