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Choose your side in the discourse. The simple, urgent message STAND UP OR STAND BY is a challenge to passivity. Red Matrix stands for authoritative, necessary analysis, and this apparel demands the same action from the wearer. It represents the choice between informed engagement and silent observation. Perfect for those who turn analysis into action and recognise the power of collective accountability. A comfortable, durable garment designed for maximum impact, made exclusively for the RM Store.
Material & Construction: The foundation for your active engagement.
Fabric: Crafted from comfortable 100% cotton (The Sport Grey option uses 90% cotton, 10% polyester).
Grams per Metre: A reliable 170-180 g/m² (5.0–5.3 oz/yd²).
Structure: This T-shirt is made using tubular fabric and open-end yarn for a classic drape.
Attention to Detail: Durability is key, with taped neck and shoulders and a professional double seam finish at the sleeves and bottom hem.
Fast Track Delivery.
The Active Engagement Tee: 'Stand Up or Stand By' Ethical & Intriguing Apparel
£14.99
Taxes included.
Material & Construction: The foundation for your active engagement.
Fabric: Crafted from comfortable 100% cotton (The Sport Grey option uses 90% cotton, 10% polyester).
Grams per Metre: A reliable 170-180 g/m² (5.0–5.3 oz/yd²).
Structure: This T-shirt is made using tubular fabric and open-end yarn for a classic drape.
Attention to Detail: Durability is key, with taped neck and shoulders and a professional double seam finish at the sleeves and bottom hem.
Fast Track Delivery.
Size guide
| LENGTH (inches) | WIDTH (inches) | SLEEVE LENGTH (inches) | |
| S | 28 | 18 | 15 ⅝ |
| M | 29 | 20 | 17 |
| L | 30 | 22 | 18 ½ |
| XL | 31 | 24 | 20 |
| 2XL | 32 | 26 | 21 ½ |
| LENGTH (cm) | WIDTH (cm) | SLEEVE LENGTH (cm) | |
| S | 71.1 | 45.7 | 39.7 |
| M | 73.7 | 50.8 | 43.2 |
| L | 76.2 | 55.9 | 47 |
| XL | 78.7 | 61 | 50.8 |
| 2XL | 81.3 | 66 | 54.6 |