"Very thick, hefty, well built. Excited to break it in!"
Slab Shirt
Built to be lived in, the Slab Shirt carries the tradition of West Coast work ethic and laid-back grit. It’s the kind of flannel that’s seen morning fog roll off the Pacific, been tossed over a hoodie when the winds shift offshore, and draped over a passenger seat still sandy from the day before. This shirt is less of a garment and more of a uniform - for those who keep it local, keep it simple, and keep showing up.
THE SPECS + DETAILS
- 11.5oz 100% heavyweight yarn dyed cotton twill
- Custom INR metal buttons
- Single chest pocket with top entry flap
- Locker loop draw cord on inside collar
- Available in black and brown
- Imported
HOW IT FITS
The Slab Shirt runs true-to-size; however, if you tend to be between sizes or prefer a roomier fit, we would recommend ordering a size up.
Caring for Hand-Knit Cotton:
Cotton is more forgiving than wool but still benefits from gentle handling, especially in hand-knit form where the stitch structure is more open and delicate.
- Hand wash in cool water with a mild detergent, or use a machine’s delicate/hand-wash cycle in a mesh laundry bag.
- Cotton can handle slightly warmer water than wool, but keep it under 40°C to preserve color and shape.
- Lay flat to dry just as you would with wool. Cotton knits can stretch when hung wet.
- A cool iron on the reverse side can refresh the fabric if needed — avoid ironing directly on textured stitches.
We offer FREE economy shipping on all contiguous U.S. orders $150+. We also provide 30-day FREE exchanges on all domestic online orders. Please read our returns policy on our FAQ page for more details.
All sale items are final.
Overall rating: 5.0 / 5 from 9 reviews.
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Reviews
Fantastic
"Love hefty flannels and this does not disappoint! The shirt fit and style is just the way I prefer. The quality is undeniable!"
Amazing shirt, great quality.
"Amazing shirt, great quality."
👍😁
"Another fantastic quality product. As with the other IR flannels I already own, super happy with purchase. Gen X so I remember when most things were manufactured to last, now referred to as “heritage” with quality footwear for example. IR flannels are heritage standard!"
Slab short
"What a great shirt. It’s heavy and stiff, feels like armour. It will stand on a table like someone is wearing it. Wash it, wear it, break it in."
Slab Shirt
"The shirt looks even better in person!"
Heavy Duty Flannel
"It seems like a good-looking shirt with a sturdy, lived-in vibe rather than anything fussy."
Eye rolling excellence
"the Slab flannel shirt. . . handsome, heavy and ridiculously well made. I got the brown, kind of wish i'd gotten the black as well. Typically whatever you buy from I & R will make you very happy. 🔥⚡️💥"
Awesome Shirt
"Straight up, these I&R flannels are everyday, anytime go to shirts."