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600TC 100% Cotton - CinchFit American Made Sheets - Fits Up To 15 Inch Depths

600TC 100% Cotton - CinchFit American Made Sheets - Fits Up To 15 Inch Depths

CinchFit

High-quality, American-made sheets with an adjustable cinch for a snug fit that stays in place.

“The cinch fit works extremely well and keeps them in place.”

— Jan L., verified buyer

$169.00 USD
$169.00 USD
Sale Sold out
Made To Order - Ships in 7-10 business days.
📏 CinchFit Sheets Size Guide
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Looking for the best value? White is our most popular color and typically ships faster — it's also our best value.

Made to Order — Ships in 8–14 Business Days.

Standard sheets don't stay on adjustable beds, split kings, or thick mattresses — they pop off corners, bunch up, and wear out fast. CinchFit was built to solve exactly that. These 600 Thread Count 100% Cotton CinchFit Sheets are proudly handcrafted in the USA with a deep 15-inch pocket and an innovative cinching cord elastic that wraps 360° around your mattress for a fit that stays put — and can be tightened over time as the fabric settles.

Extra matching 600TC 100% Cotton Pillowcase Sets are available!

Need sheets for a boat, RV, or shallow mattress? See our Shallow Pocket CinchFit Sheet Sets →

Features

  • 100% premium long-staple cotton sateen — exceptionally soft, breathable, and durable
  • 600 thread count for a luxurious, smooth feel that lasts
  • Deep 15-inch pockets fit thick mattresses and adjustable bed bases with ease
  • Cinching cord elastic wraps 360° around the mattress — sheets stay tight and never slip
  • Adjustable fit — tighten over time to maintain a perfect hold
  • Cord storage pocket and directional tags included for effortless setup
  • No-tear reinforced construction with flexible fabric — built for split top adjustable mattresses
  • Matching 600TC pillowcase sets available for a cohesive, elegant look

Versatility & Fit

Designed for Twin XL, Full, Queen, King, California King, Split King, Split Top Queen, Split Top King, and Split Top Cal King. The cinching fit adapts to traditional home mattresses, memory foam, and adjustable bases — ensuring a snug, wrinkle-free surface night after night.

Not sure what size you need? — Use our free Home Sheet Size Calculator →

For more on the CinchFit design, read our blog post "CinchFit - The Best Sheets That Fit Tight And Stay On". For adjustable bed specifics, see "Essentials For Adjustable Bed Sheets - CinchFit & FlexSquare".

Dimensions & Sizes

Twin: 39" x 75" Fitted Sheet, 100" x 66" Flat Sheet, (1) 20" x 30" Queen Pillowcase. Fits up to 15 Inch Mattresses and cinches to fit smaller depths.

Twin XL: 39" x 80" Fitted Sheet, 100" x 66" Flat Sheet, (1) 20" x 30" Queen Pillowcase. Fits up to 15 Inch Mattresses and cinches to fit smaller depths. This size also fits Twin Mattresses (39" x 75")

Full: 54" x 75" Fitted Sheet, 102" x 90" Flat Sheet, (2) 20" x 30" Queen Pillowcases. Fits up to 15 Inch Mattresses and cinches to fit smaller depths.

Queen: 60" x 80" Fitted Sheet, 102" x 90" Flat Sheet, (2) 20" x 30" Queen Pillowcases. Fits up to 15 Inch Mattresses and cinches to fit smaller depths. This size also fits Full Mattresses (54" x 75").

King: 78" x 80" Fitted Sheet, 110" x 102" Flat Sheet, (2) 20" x 40" King Pillowcases. Fits up to 15 Inch Mattresses and cinches to fit smaller depths.

Cal King: 72" x 84" Fitted Sheet, 110" x 102" Flat Sheet, (2) 20" x 40" King Pillowcases. Fits up to 15 Inch Mattresses and cinches to fit smaller depths.

Split King Sheets (5PC): 2x Fitted Sheets (39" x 80"), 1x Flat Sheet (108" x 102"), 2x King Pillow Covers (20" x 40"). Fits up to 15-inch Depth Mattresses and cinches to fit smaller depths.

Split Top Queen Sheets (4PC): 1 King Fitted Sheet (60" x 80") with 35" split down the center, 1 Flat Sheet (108" x 102"), 2 King Pillow Covers (20" x 40"); Universal Split Top Size fits all split lengths. Fits up to 15-inch Depth Mattresses and cinches to fit smaller splits and depths.

Split Top King Sheets (4PC): 1 King Fitted Sheet (78" x 80") with 35" split down the center, 1 Flat Sheet (108" x 102"), 2 King Pillow Covers (20" x 40"); Universal Split Top Size fits all split lengths. Fits up to 15-inch Depth Mattresses and cinches to fit smaller splits and depths.

Split Top Cal King Sheets (4PC): 1 Cal King Fitted Sheet (72" x 84") with 35" split down the center, 1 Flat Sheet (108" x 102"), 2 King Pillow Covers (20" x 40"); Universal Split Top Size fits all split lengths. Fits up to 15-inch Depth Mattresses and cinches to fit smaller splits and depths.

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Find Your CinchFit Fabric

Compare materials, feel, and finishes to find your favorite.

400 Thread Count Cotton Sateen

Material
100% natural cotton
Weave
400 thread count sateen
Yarns
Single-ply, long-staple cotton
Feel
Lightweight with a silky-soft glide
Look and qualities
Smooth with a subtle luminous sheen; soft, breathable, and durable

600 Thread Count Cotton Sateen

Material
100% natural cotton
Weave
600 thread count sateen
Feel
Smooth and soft, wash after wash
Look and qualities
Crisp with a subtle luminous sheen; soft, breathable, and durable

600 Thread Count Bamboo Viscose

Material
100% bamboo viscose
Feel
Soft
Comfort
Cooling and temperature-regulating
Qualities
Breathable and durable

650 Thread Count Cotton Blend

Material
70% cotton, 30% polyester
Feel
Comfortable cotton feel
Care
Easy care and wrinkle-resistant
Qualities
Durable and breathable

A cotton-rich sateen blend that combines a comfortable cotton feel with easy-care convenience. Polyester is added to help reduce creasing.

THE CINCHFIT DIFFERENCE

American-made. A fit you can adjust.

Durable cord elastic is sized to fit your mattress. It typically needs no tightening and can be adjusted over time if the fit loosens.

Made in America.

American-made craftsmanship.

Mattress-sized cord elastic.

Sized to fit your mattress from the start.

Adjustable over time.

Fine-tune the fit if it loosens.

Our CinchFit Sheets are American Made luxury fitted sheets featuring an innovative cinching system that keeps your sheets on all night long. Available in 400TC and 600TC 100% cotton, CinchFit is engineered for every sleep situation — from your home bedroom to boats, RVs, adjustable bases, and dorm rooms.

Shop by Category: Home Sheets | Adjustable Bed Sheets | Boat Sheets | RV Sheets | Shallow Pocket Sheets | 400TC Sheet Sets | 600TC Sheet Sets | Pillowcases | Mattress Pads & Protectors

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CinchFit FAQs

How does the adjustable fit work?

The durable cord elastic is sized to fit your mattress. It typically needs no tightening and can be adjusted over time if the fit loosens.

How do I choose the right size?

See the CinchFit Sheets size and fit FAQs for guidance.

Where are CinchFit sheets made?

CinchFit sheets are American made.

View all CinchFit FAQs

View all CinchFit FAQs

Customer Reviews

Overall rating: 4.8 / 5 from 182 reviews.

These are some GLORIOUS 600 count 100% cotton sheets! The colors are superb, and the thread count, feel, and texture of these sheets are also excellent. The adjustable tie on the bottom sheet is also very useful during the initial bed fitting.

Chris G. 5/5 Verified

CinchFit 600TC 100% Cotton Cord Elastic Sheets American Made

A Fabulous USA-Made Bedding Source. Quahog Bay Bedding is the … A Fabulous USA-Made Bedding Source. Quahog Bay Bedding is the real deal. Their bedding is USA-made, they offer excellent, responsive customer service and their prices are reasonable. My wife and I will be buying all of our bedding from them from now on!

Jason D. 5/5

CinchFit 600TC 100% Cotton Cord Elastic Sheets American Made

Customer photo review of CinchFit 600TC 100% Cotton Cord Elastic Sheets American Made

The sheets we bought from Sleep Number tore almost immediately at the top split area. They didn’t fit well causing the bottom fitted sheet to wrinkle. The Quahog Bay sheets fit well and are engineered to take the stress that a top split king mattress puts on the fitted sheet. The material is a little thicker than the other sheets also. I would give them ⭐️⭐️⭐️⭐️.

Michael G. 5/5 Verified

CinchFit 600TC 100% Cotton Cord Elastic Sheets American Made

Customer photo review of CinchFit American Made Stay On & No Tear 600TC 100% Cotton Sheet Sets

The sheets we bought from Sleep Number tore almost immediately at the top split area. They didn’t fit well causing the bottom fitted sheet to wrinkle. The Quahog Bay sheets fit well and are engineered to take the stress that a top split king mattress puts on the fitted sheet. The material is a little thicker than the other sheets also. I would give them ⭐️⭐️⭐️⭐️.

Michael G. 5/5

CinchFit American Made Stay On & No Tear 600TC 100% Cotton Sheet Sets

I have been purchasing these sheet sets for 5 years now. They were very soft right from the package. The cinch fit works extremely well and keeps them in place. Nice color selection. It is very difficult to find the fitted sheets for a split mattress bed. Quahog Bay made it simple!!

Jan L. 5/5 Verified

CinchFit American Made 600TC 100% Cotton Sheet Sets - All Sizes

I have been purchasing these sheet sets for 5 years now. They were very soft right from the package. The cinch fit works extremely well and keeps them in place. Nice color selection. It is very difficult to find the fitted sheets for a split mattress bed. Quahog Bay made it simple!!

Jan L. 5/5

CinchFit American Made Stay On & No Tear 600TC 100% Cotton Sheet Sets

They seem like they will be nice sheets. The problem I have is the cinch mechanism is too hard to maneuver. My husband and I had to work together to tighten them and we struggled. The toggle should be more user friendly. We haven’t slept on them yet, but I think I would like to make them tighter, but gave up on it. I also think they should have cinching on both sides to make it easier and more efficient, as it’s hard to pull enough string through from the whole diameter of the bed.

Pamela M. 3/5 Verified

CinchFit 600TC 100% Cotton, Stay On, Adjustable, Cord Elastic Sheets American Made Sheets

They seem like they will be nice sheets. The problem I have is the cinch mechanism is too hard to maneuver. My husband and I had to work together to tighten them and we struggled. The toggle should be more user friendly. We haven’t slept on them yet, but I think I would like to make them tighter, but gave up on it. I also think they should have cinching on both sides to make it easier and more efficient, as it’s hard to pull enough string through from the whole diameter of the bed.

Pamela M. 3/5

CinchFit American Made Stay On & No Tear 600TC 100% Cotton Sheet Sets

The idea is genius but the actuality on a big king size bed is disappointing. It is really hard to evenly tighten the elastic to keep all the sides down. It doesn’t help that we have a mattress that adjusts head and foot positions, but it isn’t the perfect option I had hoped for.

Elizabeth H. 3/5 Verified

CinchFit 600TC 100% Cotton, Stay On, Adjustable, Cord Elastic Sheets American Made Sheets

Store owner replied: Thank you for your review! Please do tighten the cording while the split top fitted sheet is not on the mattress so you can get that snug fit you are looking for. With the split top size and flexible jersey knit material, it can take this extra step to get it fitting perfectly on some mattresses. Please contact us directly for more help if needed too. Thanks so much!

The idea is genius but the actuality on a big king size bed is disappointing. It is really hard to evenly tighten the elastic to keep all the sides down. It doesn’t help that we have a mattress that adjusts head and foot positions, but it isn’t the perfect option I had hoped for.

Elizabeth H. 3/5

CinchFit American Made Stay On & No Tear 600TC 100% Cotton Sheet Sets

Store owner replied: Thank you for your review! Please do tighten the cording while the split top fitted sheet is not on the mattress so you can get that snug fit you are looking for. With the split top size and flexible jersey knit material, it can take this extra step to get it fitting perfectly on some mattresses. Please contact us directly for more help if needed too. Thanks so much!

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