Next Cult Brand
Gym Tank Top Sworn to the Iron Oath Medieval Knight Muscle Shirt for Heavy Lifters
Gym Tank Top Sworn to the Iron Oath Medieval Knight Muscle Shirt for Heavy Lifters
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- Free shipping from 99€
- Made just for you - zero waste, better environment
- 14-day return policy
• Made for powerlifters, bodybuilders, deadlift fans, and lifters committed to heavy barbell training.
• Great muscle shirt for strength sessions, bodybuilding workouts, leg day, and warm-weather gym training.
• Strong gift for a gym bro, powerlifter, coach, boyfriend, or training partner devoted to the iron.
This gym tank top turns Sworn to the Iron Oath into a medieval declaration for athletes who have made strength training part of their identity. The knightly oath and loaded barbell connect discipline, loyalty, and heavy lifting in a design made for people who genuinely enjoy hard training.
The concept fits bodybuilders, powerlifters, strength athletes, and gym regulars who spend their time around barbells, heavy plates, deadlifts, squats, and demanding training sessions. It speaks to the mentality of being committed to improvement over years rather than chasing quick motivation.
Wear this tank top, vest, muscle shirt, athletic shirt, undershirt, or top for bodybuilding, powerlifting, strength workouts, leg day, deadlift sessions, summer training, or everyday gym wear. The medieval knight artwork gives the design an old-world warrior feel that also appeals to fans of Gothic graphics, fantasy culture, historic armor, and darker fitness aesthetics.
It makes a distinctive birthday, Christmas, competition, new-PR, gym anniversary, bodybuilding milestone, or training-partner gift. Give it to the lifter who plans life around training, the powerlifter preparing for meet day, or the gym friend who has long since accepted that lifting heavy things is now part of their personality.
Designed by Uplift Iron Club for Next Cult Brand, this tank top combines Sworn to the Iron Oath, lifting iron, heavy barbells, medieval knights, bodybuilding, powerlifting, gym workouts, fitness, exercise, and serious training.
A classic, staple tank top. A timeless classic intended for anyone looking for great quality and softness.
• 100% combed and ringspun cotton
• Tri-blends are 50% polyester/25% combed/25% ringspun cotton/rayon
• Fabric weight: 4.2 oz/yd² (142.40 g/m²), triblends: 3.8 oz/yd² (90.07 g/m²)
• 30 singles thread weight
• Side-seamed
• Blank product sourced from Nicaragua, Honduras, or the US
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 level requirements.
In compliance with the General Product Safety Regulation (GPSR), Next Cult Brand ensures that all consumer products offered are safe and meet EU standards. For any product safety related inquiries or concerns, please contact us at info@nextcultbrand.com or write to us Next Cult Brand.
Size Chart
Size Chart
Check out our Sizing Guide
Shipping & Delivery
Shipping & Delivery
Your orders are professionally handled by our print-on-demand partners, who choose the best shipping options for your location.
📦 Delivery Times: 2-14 business days (varies by location/season)
🚚 Shipping Costs: Calculated at checkout
🎁 Free Shipping: Orders over €99* (most regions)
Returns & Refunds
Returns & Refunds
Yes, you can return your package within 14 days. Simply send us an email to info@nextcultbrand.com, and we'll guide you through the process. See the full Return Policy.
Partager

60K+
ORDERS SHIPPED
7 YEARS
IN BUSINESS
LOCALLY MADE
IN THE US, EU, UK, CANADA, MEXICO & AUSTRALIA
Let customers speak for us
from 9986 reviews
As a huge Batman fan and a gym regular, this shirt is just perfect. The material is super soft and has held up really well after multiple washes. I've gotten so many laughs and nods at the gym – it’s a total conversation starter. Finally, a pump cover that shows off my sense of humor along with my (aspiring) gains.
I've worn and washed this shirt a dozen times already, and it still looks brand new. The fit is perfect, and it's soft enough to wear all day. The Cookie Monster design is printed perfectly. It’s my new favorite shirt for both the gym and casual wear.
Absolutely love this shirt! As a bigger guy who's also a huge Batman fan, this design is hilarious and perfect. The material is super soft and the print quality is great. Got my normal size and it fits perfectly.
Wore this to The Weekend concert and got so many compliments. This shirt perfectly combines my love for The Weeknd and the gym. It's comfortable enough to sweat in but cool enough that I’ve worn it out
Saw a guy wearing this at my powerlifting gym and had to ask where he got it. So glad I found it here! The fit is great and the design is awesome. It’s become a staple for the gym. Perfect for anyone who takes their training seriously.
Bought this for my boyfriend and he hasn't taken it off! He's all about that bulking life and loves the Hulk, so this was a perfect match. The sizing was accurate and he said it's one of the most comfortable shirts he owns. Big win!
My husband is a huge Batman fan with a great sense of humor. When I saw this shirt with fat Batman on a scooter, I knew it was perfect. He hasn't stopped wearing it since it arrived! The fit is true to size and the material is soft. A hilarious and well-made tee.
As a powerlifter and a huge AC/DC fan, this shirt feels like it was made specifically for me. The quality is top-notch, and the design is a great conversation starter. It’s refreshing to see gym apparel that’s actually clever and not just another generic brand logo.
The design is genius and the quality is top-notch. It’s become my go-to for the gym. Fits true to size and the graphic is super soft, not that stiff plastic-y feel. Next Cult Brand nailed it with this one.
Do you have questions? We have answers!
How long does shipping take?
Delivery usually takes between 2-14 business days, depending on the exact location and the time of year.
All of our orders are shipped by our POD (print on demand) as soon as the product is produced. Our products are made on demand, so it usually takes a few days for production and a few days for delivery.
Can I return my package?
Yes, you can return your package within 14 days. Simply send us an email to info@nextcultbrand.com, and we'll guide you through the process. See the full Return Policy.
Why is my tracking information not updating?
Please be patient, as delays, especially through customs, are possible. If the status has not changed after 3 days, contact us at info@nextcultbrand.com
How do I find the right size for me?
We attach great importance to ensuring our clothing fits perfectly. On every product page, you'll find a size chart to help you determine your ideal size. If you're between sizes or unsure, we recommend choosing a size larger. This will ensure the items are comfortable and fit perfectly. See the full Size Guide.
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