// social proof · reviews
Built for us. Reviewed by us.
★ 4.8 · 2,400+ reviews

A Unix and cybersecurity t-shirt inspired by the classic Practical Unix & Internet Security theme, made for system administrators, security analysts, Linux users, network professionals, and tech enthusiasts who value old school security knowledge. This design connects Unix culture, internet security, system hardening, server protection, shell environments, network defense, information security, and practical administration. A great choice for anyone who works with Linux systems, cybersecurity operations, secure infrastructure, or vintage tech references. Rock a classic sweatshirt silhouette with ribbed crew neck, long sleeve cuffs, and a flat hem. Layer it up or wear it on its own for a contemporary streetwear look. With the soft fleece inside and comfortable fit, it’s sure to become your favorite everyday sweater right away! • 100% cotton face • 65% cotton, 35% polyester • Charcoal Heather is 55% cotton, 45% polyester • Fabric weight: 8.5 oz/y² (288.2 g/m²) • Tightly knit 3-end fleece • Side-seamed construction • Self-fabric patch on the back • Double-needle stitched rib collar, cuffs, and hem • Blank product sourced from Pakistan Disclaimer: This sweatshirt runs small. For the perfect fit, we recommend ordering one size larger than your usual size. This product is made especially for you as soon as you place an order, which is why it takes us a bit longer to deliver it to you. Making products on demand instead of in bulk helps reduce overproduction, so thank you for making thoughtful purchasing decisions! Age restrictions: For adults EU Warranty: 2 years Other compliance information: Meets the flammability, lead, cadmium, bisphenols and phthalates level requirements. In compliance with the General Product Safety Regulation (GPSR), Oak inc. and SINDEN VENTURES LIMITED ensure that all consumer products offered are safe and meet EU standards. For any product safety related inquiries or concerns, please contact our EU representative at gpsr@sindenventures.com. You can also write to us at 123 Main Street, Anytown, Country or Markou Evgenikou 11, Mesa Geitonia, 4002, Limassol, Cyprus.Size guide BODY LENGTH (inches) CHEST WIDTH (inches) SLEEVE LENGTH (inches) S 27 20 23 ½ M 28 21 24 L 29 23 24 XL 30 25 24 2XL 31 26 ½ 24 3XL 32 28 24 BODY LENGTH (cm) CHEST WIDTH (cm) SLEEVE LENGTH (cm) S 68.6 50.8 59.7 M 71.1 53.3 61 L 73.7 58.4 61 XL 76.2 63.5 61 2XL 78.7 67.3 61 3XL 81.3 71.1 61
A Unix and cybersecurity t-shirt inspired by the classic Practical Unix & Internet Security theme, made for system administrators, security analysts, Linux users, network professionals, and tech enthusiasts who value old school security knowledge. This design connects Unix culture, internet security, system hardening, server protection, shell environments, network defense, information security, and practical administration. A great choice for anyone who works with Linux systems, cybersecurity operations, secure infrastructure, or vintage tech references. Rock a classic sweatshirt silhouette with ribbed crew neck, long sleeve cuffs, and a flat hem. Layer it up or wear it on its own for a contemporary streetwear look. With the soft fleece inside and comfortable fit, it’s sure to become your favorite everyday sweater right away! • 100% cotton face • 65% cotton, 35% polyester • Charcoal Heather is 55% cotton, 45% polyester • Fabric weight: 8.5 oz/y² (288.2 g/m²) • Tightly knit 3-end fleece • Side-seamed construction • Self-fabric patch on the back • Double-needle stitched rib collar, cuffs, and hem • Blank product sourced from Pakistan Disclaimer: This sweatshirt runs small. For the perfect fit, we recommend ordering one size larger than your usual size. This product is made especially for you as soon as you place an order, which is why it takes us a bit longer to deliver it to you. Making products on demand instead of in bulk helps reduce overproduction, so thank you for making thoughtful purchasing decisions! Age restrictions: For adults EU Warranty: 2 years Other compliance information: Meets the flammability, lead, cadmium, bisphenols and phthalates level requirements. In compliance with the General Product Safety Regulation (GPSR), Oak inc. and SINDEN VENTURES LIMITED ensure that all consumer products offered are safe and meet EU standards. For any product safety related inquiries or concerns, please contact our EU representative at gpsr@sindenventures.com. You can also write to us at 123 Main Street, Anytown, Country or Markou Evgenikou 11, Mesa Geitonia, 4002, Limassol, Cyprus.Size guide BODY LENGTH (inches) CHEST WIDTH (inches) SLEEVE LENGTH (inches) S 27 20 23 ½ M 28 21 24 L 29 23 24 XL 30 25 24 2XL 31 26 ½ 24 3XL 32 28 24 BODY LENGTH (cm) CHEST WIDTH (cm) SLEEVE LENGTH (cm) S 68.6 50.8 59.7 M 71.1 53.3 61 L 73.7 58.4 61 XL 76.2 63.5 61 2XL 78.7 67.3 61 3XL 81.3 71.1 61
// social proof · reviews
Built for us. Reviewed by us.
★ 4.8 · 2,400+ reviews
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