E=MC² Muscle Shirt

The E=MC² Muscle Shirt is a soft, sleeveless piece made for comfort, movement, and everyday expression. With its relaxed fit and wide, low-cut armholes, it has an easy casual shape that works well for warm days, festivals, walks, yoga, lounging, creative spaces, or daily wear.

Made from 100% airlume combed ring-spun cotton, it has a lightweight, breathable feel. The side-seamed construction adds structure for regular use, while the relaxed cut makes it comfortable on its own or layered over another top.

Simple, comfortable, and expressive, this muscle shirt is a wearable nod to energy, motion, and the connection between science and imagination.

Product details:
100% airlume combed ring-spun cotton
Fabric weight: 4.2 oz/yd²
32 singles
Relaxed fit
Side-seamed construction
Wide, low-cut armholes
Blank product sourced from Nicaragua, Honduras, or the US

This product is made especially for you when you place your order. Making items on demand instead of in bulk helps reduce overproduction, so thank you for making a thoughtful purchasing decision.

Age restrictions: For adults
EU Warranty: 2 years
Compliance: Meets flammability level requirements.

In compliance with the General Product Safety Regulation (GPSR), Earthdance Global 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 the EU representative at gpsr@sindenventures.com. You can also write to Earthdance Global at PO Box 81746, Haiku, HI 96708, or to SINDEN VENTURES LIMITED at Markou Evgenikou 11, Mesa Geitonia, 4002, Limassol, Cyprus.