Worn by 12,000+ men who carry it around the middle
Selorna™ CoreLock Shaping Tank
Selorna™ CoreLock Shaping Tank
Flattens the middle the second it goes on
Disappears under a t-shirt
Takes the pull off the lower back all day
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Sizing & Fit
Sizing & Fit
Order your usual size. If you're between two, take the larger one.
The instinct with a shaping tank is to size down for more hold. Don't. A tank that's too small can't flatten the middle, because the softness has nowhere to go — it grips above and below, pushes everything forward, and starts riding up within minutes. Tighter looks bigger. CoreLock™ does the holding, so your true size is the right size.
Not sure, or the size isn't right? Email support@selorna.com and our team will help you sort it out.
How to Measure
- Measure around the fullest part of your stomach, not around your waistband
- Keep the tape level and snug — not pulled tight
- Measure over bare skin or a thin shirt, standing relaxed
- Use that number on the chart, not your usual shirt size
Getting the Fit Right
Order your usual size; take the larger one if you're between sizes. Never size down for more compression — it works against you.
Materials & Care
Materials & Care
CoreLock™ Compression Knit: 74% nylon, 26% spandex — more than double the stretch fibre of a standard compression tee, which is what lets it hold at true size instead of relying on being tight.
Zoned Construction: Firmer through the stomach, easier across the chest, so the middle is held without flattening everything above it.
Sleeveless Crew Cut: Full shoulder coverage and a flat neckline — no narrow straps digging in, and no outline printing through a shirt.
Nylon Frame: Nylon moves air and sweat instead of trapping heat, so it stays wearable under clothes for a full day.
Care
Machine wash cold on a gentle cycle. Do not bleach. Do not tumble dry. Do not iron. Hang to dry — heat is what breaks down stretch fibre, and stretch fibre is what makes this work.
Shipping & Returns
Shipping & Returns
• Built to Hold, Not to Go Slack
Each tank is knitted with CoreLock™ Compression, built to hold its shape through daily wear and to come back the same after every cold wash — not to stretch out and end up an ordinary undershirt by the third day.
• 90-Day Satisfaction Policy
Not sure it's right for you? Take 90 days to wear it at home, at work, and under real clothes on real days. Our support team is here to help you find your size and settle in comfortably, so you're not left guessing. Because your confidence deserves better than trial and error.
Discover more about our customer-friendly solutions click here.
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Selorna™ CoreLock Shaping Tank
Real stories from men who'd already tried everything
Better Body = Improved Appearance
Look Leaner. Feel Lighter. Stop Thinking About It.
Carrying weight around the middle asks more of a man than most people realise. It pulls forward all day, so the lower back braces against it and aches by mid-afternoon. The skin stretches and marks. Folds trap heat and rub raw. And every mirror, every photo, every shirt that doesn't sit right chips away at how a man feels about himself — until the easy answer becomes a bigger shirt and a hope that nobody looks too closely.
Selorna™ CoreLock Shaping Tank lifts and holds that weight instead of letting it hang. CoreLock™ Compression does the holding — firm through the middle, easier across the chest — so the front reads flat, the pull comes off the lower back, and the skin stays supported instead of dragging all day. Built on a soft nylon frame that breathes and moves with the body, it stays comfortable from morning to night and disappears completely under a t-shirt. No corset feeling. No struggle getting it on. Just a flatter shape, a lighter middle, and the quiet confidence that comes from not thinking about it.
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You've Tried Covering It Up. It Still Shows.
A bigger shirt. Then darker colours. Then leaving it untucked, maybe a second layer, maybe holding it in for the photo. Each one works for a moment. Then you sit down, and it's back.
Here is what almost nobody is told: the problem isn't the weight, it's that nothing is holding it. A soft middle sits forward all day. The lower back braces against it, the skin drags and marks, the folds stay warm and raw and no shirt you buy will change any of that.
Selorna holds the weight upinstead of squeezing it flat.
Flatten the middle the second it goes on
Take the pull off your lower back all day
Wear it under a t-shirt with nothing showing
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CoreLock™ Compression
Holding power comes from stretch fibre, not tightness. Knitted at 26% — more than double a standard compression tee — so the fabric does the holding at true size instead of being shrunk down to fake it.
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Zoned Hold
Most tanks press everything flat from collar to waist. This one is firm through the stomach where the softness sits, easier across the chest — so the middle gets handled and the chest still reads solid.
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Posture Support
A soft middle pulls forward all day, and the lower back braces against it. Holding that weight up takes the strain off, so the back finishes the day with less to recover from.
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Breathes All Day
Compression usually means trapped heat. This is knitted onto a nylon frame that keeps moving air and sweat, so it holds hard all day instead of turning into a plastic bag by mid-afternoon.
Most Tanks Are Built To A Price
Where ordinary tanks cut cost, CoreLock™ holds.
CUSTOMER PROVEN RESULTS
96%
Noticed their Shirts Sat Straight again, with nothing catching at the stomach.
94%
Noticed less Lower-Back Strain by the End of a Long Day.
89%
Noticed No Digging at the Armpit, thanks to the Sleeveless Crew Cut.
86%
Noticed it Stayed Cool under Clothes through a Full Day.
*Based on a survey of 800 Selorna customers after 60 days of wear. Individual results vary.
Try It for 90 Days, Worry-Free
A shaping tank tells you something in the first two seconds — you look down and the front is flatter. What it doesn't tell you is whether it's still flat at the end of a work day, or whether it holds the same after a month of washes. That's why every tank comes with our 90-Day Fit Promise.
Wear it under a work shirt, under a t-shirt, sitting in the car, through a full day on your feet. Wash it and wear it again. If it rides up, loses its hold, or the size isn't right, reach out — our team will work with you to sort it, whether that's finding your correct size or replacing it outright.
Because the mirror is the easy part. Staying flat at the end of the day is the part that counts.
FAQ
The questions a burned buyer actually asks
1. What is this tank actually for?
1. What is this tank actually for?
Holding the soft part of the middle in so the front reads flat under clothes — all day, not for an hour. It's an undershirt, not gym kit.
Is this real compression, or just a tight shirt?
Is this real compression, or just a tight shirt?
Real. A tight shirt is 5–10% stretch fibre on polyester. This is 26% on nylon — same look on a hanger, completely different on a body.
What size should I order?
What size should I order?
Your true size. Sizing down to force more hold backfires: too small can't flatten the middle, so it grips above and below, pushes everything forward and rides up. Tighter looks bigger.
Will it roll up?
Will it roll up?
That's the failure this was built around. If it rides up on a correctly-sized body, tell us and we'll make it right.
Will it show under my shirt?
Will it show under my shirt?
No. A thick stitched band at the hem is what prints that line through a thin shirt — this one is finished flat, so it reads as one smooth layer.
Will it flatten my chest too?
Will it flatten my chest too?
No. The middle is held firmer than the chest on purpose. Plenty of men want the stomach handled and the chest left alone.
Does it get hot under clothes?
Does it get hot under clothes?
The cheap tier is polyester, which traps heat. This is knitted on a nylon frame that moves air and sweat, so it stays wearable for a full day.
Does it lose its hold after washing?
Does it lose its hold after washing?
That's what low stretch content does. At 26% the knit returns to shape. Wash cold, hang dry — heat is what kills stretch fibre.
Does it help me lose weight?
Does it help me lose weight?
No. No shirt does, and anyone selling one that melts fat at a desk is selling a story.