Built for the young warriors who dream big and move bold.
This tee features our exclusive Astronaut Ninja—part space explorer, part silent warrior—ready to conquer any mission with style and confidence. Rockin’ the signature katana and futuristic drip, this character represents courage, curiosity, and the Relentless mindset: Hustle hard. Level up. Never back down.
✅ Available in multiple colors
✅ Youth sizing
✅ Soft, breathable cotton blend
✅ Eye-catching front chest hit + full back artwork
✅ Bold “Relentless Lifestyle” print to remind them to stay focused and fearless
Whether they’re on the playground, in the dojo, or exploring their own universe—this tee’s got their back.
• 100% cotton
• Sport Grey is 90% cotton, 10% polyester
• Fabric weight: 5.3 oz./yd² (180 g/m²)
• Pre-shrunk fabric
• Classic fit
• Taped neck and shoulders
• Made with OEKO-TEX certified low-impact dyes
Disclaimer: Due to the fabric properties, the White color variant may appear off-white rather than bright white.
Size guide
| |
LENGTH (inches) |
CHEST (inches) |
| XS |
20 ½ |
16 |
| S |
22 |
17 |
| M |
23 ½ |
18 |
| L |
25 |
19 |
| XL |
26 ½ |
20 |
| |
LENGTH (cm) |
CHEST (cm) |
| XS |
52 |
40.6 |
| S |
55.9 |
43.2 |
| M |
59.7 |
45.7 |
| L |
63.5 |
48.3 |
| XL |
67.3 |
50.8 |
