nspired by Isaac Newton himself, the Isaac Shirt proves that comfort and polish can coexist. Made from SmartCotton, a breathable stretch cotton blend, it wicks moisture, resists wrinkles, and moves with you to maintain a crisp look from morning to night.
Designed for big & tall men, it offers a tailored fit with unrestricted mobility—combining timeless style with intelligent performance for every occasion.
Fabric Properties:
4-Way Stretch
Wrinkle Resistant
Quick Drying
Moisture Wicking
Garment Properties:
Tailored shoulder for better fit
Fitted sleeves for a flattering silhouette
Longer body for full coverage
Front breast pocket
Isaac Shirt
$63.20
Regular price
$79.00
THE SCIENCE IN THE FABRIC
The Isaac Shirt is crafted from Oxtera, a sophisticated stretch woven fabric that merges the comfort of natural cotton with the resilience of advanced performance fibers. Comprised of 70% cotton, 27% polyester, and 3% elastane, Oxtera delivers the breathable softness of a traditional Oxford fabric with the built-in stretch and wrinkle resistance of modern technical wear. The result is a shirt that feels effortless, looks polished, and performs through the demands of a full day.
Oxtera’s innovation begins at the fiber level. Long-staple cotton provides a smooth, breathable base that regulates temperature and wicks away moisture, while polyester fibers are interlaced to enhance durability and shape retention. The subtle addition of elastane allows the fabric to stretch in all directions, enabling greater mobility across the shoulders and torso without pulling or bunching. This engineered elasticity ensures comfort whether you’re in motion or at rest.
What sets Oxtera apart is its intelligent weave structure, designed to resist wrinkles and maintain a crisp, refined appearance from morning to night. The fabric’s micro-stretch properties allow it to flex with the body, reducing tension across seams and keeping the shirt smooth and composed. The Isaac Shirt embodies the science of everyday performance—balancing luxury, flexibility, and technical precision in one refined design.
The Physics of Fit & Sizing
The Isaac Shirt was engineered for precision comfort, using strategic seam placement and proportional grading to accommodate Big & Tall frames. Its design follows the body’s natural movement, with advanced stretch recovery that maintains structure without restriction. True to the brand’s science-driven approach, every element—from shoulder width to armhole depth—was calibrated to provide ease of motion and a clean, confident silhouette that moves as you do.
Sizing Recommendation
The Isaac Shirt fits true to size, offering generous room through the torso and midsection. The sleeves are more fitted to achieve a tailored, athletic look, which may feel snug initially on men with larger arms. However, the stretch in the fabric quickly adapts, allowing the shirt to remain comfortable while highlighting the arms and shoulders. Choose your usual size for the intended fit or size down if you prefer for a more fitted torso.
The Isaac Shirt comes in both a Regular and Tall size, with the tall size adding 2.5" to the length of the garment and 3" to the length of the sleeve.
The Chemistry of Care
Every formula needs balance. Oxtera farbic is engineered for performance and longevity, but a little mindful care keeps it's molecular structure, and your comfort, intact.
Follow these care notes to preserve the stretch, softness, and durability that makes your Isaac Shirt feel brand new, wash after wash.
Machine wash cold with like colors.
Tumble dry low.
Remove immediately from dryer to keep fabric wrinkle free.
Do not iron. Light steam for touch up.
Do not bleach.
Dry clean friendly.
the velocity of delivery
Your gear moves fast—so should your order. We’ve streamlined every step of fulfillment using precision logistics to ensure your clothing arrives swiftly and seamlessly.
We offer free domestic shipping for orders over $50 in addition to expedited shipping options, because performance shouldn’t slow down at checkout.
This is a button up for people who hate button ups. Super comfy. Don't have to worry about the buttons popping off.
D
Derek S.
Pretty good
The shirt fits well and is a comfortable material. The collar is a little weird, not something you would wear a tie with if that’s what you’re looking for but for casual wear it’s good. Expensive for what it is but finding good clothes for big people is difficult.
T
Travis L.
I bought a Lululemon “Oxford” shirt last year in 2X. It didn’t fit and I returned it. This shirt feels just like the Lulu shirt but it’s true to size and cheaper. Wish they had more colors I’d buy them all.
A
Alex R.
Great fit. No baggy arms like other button ups. Great shirt.
D
Darren S.
As a fat guy I hate wearing button downs feeling like the buttons are about to pop off when I sit. Don’t even think about it with this shirt. Game changer.
