September 21, 2026 (9:00 am PT) through September 27, 2026 (11:59 pm PT), or while supplies last, get 20% off select items at creations.mattel.com/collections/limited-sale-event. Discount automatically applied at checkout. Club 59, Club Grayskull, Fang Club, and Red Line Club Members get an additional 5% off with code MEMBERFIVE. Cannot be combined with other offers. No prior-purchase adjustments. Taxes, shipping, and handling excluded. Void where prohibited.
This Masters of the Universe Become Eternian Customizable Black T-Shirt is everything you've dreamed of and more. It feels soft and lightweight, with the right amount of stretch. It's comfortable and flattering for all. This exclusive Masters of the Universe™ design is only available through Mattel Creations.
• Masters of the Universe™ Become Eternian Customizable Black T-Shirt
• 100% combed and ring-spun cotton
• Fabric weight: 4.2 oz./yd.² (142 g/m²)
• Pre-shrunk fabric
• Side-seamed construction
• Shoulder-to-shoulder taping
• Unisex sizing S-3XL
Colors and decorations may vary. This item is available for US shipping ONLY and shipped separately from other products on our site. Expedited shipping is not available at this time. Final sale, no refunds or exchanges. Read the FAQ here for full details. ©2026 Mattel. All rights reserved. (s26)
Size guide
| LENGTH (inches) | WIDTH (inches) | CHEST (inches) | |
| S | 28 | 18 | 34-37 |
| M | 29 | 20 | 38-41 |
| L | 30 | 22 | 42-45 |
| XL | 31 | 24 | 46-49 |
| 2XL | 32 | 26 | 50-53 |
| 3XL | 33 | 28 | 54-57 |
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