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Women's Ultrafine Merino Sleep Bottoms

Name: Women's Ultrafine Merino Sleep Bottoms
Brand: Unbound Merino
SKU: W-SPBM-BLCK-XS-28
Price: 138.0 USD
Availability: InStock
Rating: 4.8 (170 reviews)

4.8

Rated 4.8 out of 5 stars

170 Reviews

$138

100% Merino Wool. 165gsm.

Women's bottoms size guide

Customer fit: based on XX reviews

4.8

Rated 4.8 out of 5 stars

Based on 170 reviews

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How did you find the fit?Rated 0.3 on a scale of minus 2 to 2

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170 reviews

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MA
Meredith A.
Verified Buyer
I recommend this product
What size did you buy? XL
Rated 5 out of 5 stars
9/26/26
Lovely for warmer weather
I love these pajamas. They aer perfect for warmer weather. Now that the weather is now, I'm putting them away for my next trip to warmer climes and spring.
How did you find the fit?Rated 0.0 on a scale of minus 2 to 2
Was this helpful?
CH
Cynthia H.
Verified Buyer
I recommend this product
What size did you buy? XL
Rated 5 out of 5 stars
9/20/26
Great
These are great comfy pants. I plan to use them mostly when traveling. Great fit.
How did you find the fit?Rated 0.0 on a scale of minus 2 to 2
Was this helpful?
SL
Sara L.
Verified Buyer
I recommend this product
What size did you buy? XL
Rated 5 out of 5 stars
9/19/26
Great PJs!
Super comfy PJs; packed down small and did not overheat while wearing these which happens frequently to my post-menopausal self.
How did you find the fit?Rated 0.0 on a scale of minus 2 to 2
Was this helpful?
RD
Risa D.
Verified Buyer
I recommend this product
What size did you buy? L
Rated 5 out of 5 stars
9/17/26
Simply the best and most comfortable!
Can't wait to get another pair.
How did you find the fit?Rated 0.0 on a scale of minus 2 to 2
Was this helpful?
JD
Julie D.
Verified Buyer
I recommend this product
What size did you buy? XS
Rated 5 out of 5 stars
9/13/26
Comfy
Comfy, tts, like the fact that I can take on trips and sleep multiple nights in them and not feel yucky. Plan on buying another set.
How did you find the fit?Rated 0.0 on a scale of minus 2 to 2
Was this helpful?

in

cm

XS

S

M

L

XL

Size	Waist	Hip	US Size
XS	24 - 2561 - 63.5	35 - 3689 - 91.5	0-2
S	26 - 2766 - 68.5	37 - 3894 - 96.5	4-6
M	28 - 2971 - 73.5	39 - 4099 - 101.5	8-10
L	30 - 3276 - 81	41 - 43104 - 109	12-14
XL	33 - 3584 - 89	44 - 46112 - 117	16-18

XS

S

M

L

XL

Garment measurements	XS	S	M	L	XL
Waist Width - Relaxed	12 1/231.8	13 1/234.3	14 1/236.8	1640.6	17 1/244.5
Waist Width - Extended	1743.2	1845.7	1948.3	20 1/252.1	2255.9
Hip Width	2050.8	2153.3	2255.9	23 1/259.7	2563.5
Thigh Width	1230.5	12 1/231.8	1333.0	13 3/434.9	14 1/236.8
Inseam Length - Short	2871.1	2871.1	2871.1	2871.1	2871.1
Inseam Length - Long	3076.2	3076.2	3076.2	3076.2	3076.2

1WAIST

Place the measuring tape at your natural waist - above the hips at the narrowest part of your torso.

2HIPS

Measured around the fullest part of the hip, parallel to the floor.

3INSEAM

Measure from crotch point to bottom hem edge.

1 Waist Width

Measure along waistband curve edge to edge.

2 Hip Width

Measure 3" above crotch point, side to side.

3 Thigh Width

Measure 1" below crotch, edge to edge.

4 Leg Opening

Measure along hem edge, side to side.

5 Inseam Length

Measure from crotch point to bottom hem edge.

Add to cart

Sleep Better In Merino Wool.

Temperature-regulating properties mean you’re never too hot or cold.

Super-soft feel against your skin.

Won’t smell after weeks of wear, unlike cotton or synthetics.

Dries really fast, keeping you comfortable.

Folds up compactly, saving you essential packing space.

Nature's Miracle Fabric

Merino wool fibers allow it to wick moisture away from your skin, which ensures comfort and moisture management. Merino wool’s complex structure locks odor molecules within the fiber and only releases them on washing.

Softer than cotton

This wool isn’t like your typical itchy sweater. We only use superfine (15.5 micron) Merino wool, resulting in a luxuriously silky soft shirt that’s lighter and much softer than the average Merino or cotton shirt. It’ll also maintain its form over time and not get ruined after a wash, like most clothes these days.

Ultrafine Sleep Jersey

Made from 15.5 micron ultrafine Merino wool, this sleep jersey is cloud-soft and temperature regulating—ideal for uninterrupted rest. Lightweight and breathable at 165gsm, it keeps you cool or warm as needed. Perfect for home or travel, it’s comfort you’ll look forward to every night.

“The perfect T-shirt can see you through almost any situation, and Unbound makes a strong bid for the title with their chic Merino designs.”

"It's the most popular T-shirt in our Merino guide and well-loved by travelers. It's very soft and lightweight, and it packs down to a tiny roll."

“These tees have a sophisticated European elegance to them, thanks to both the material and design. Just looking at them makes you feel chic.”

“Between the flattering fit and the classic style, it's a great option for travel.”

"I may hold off on washing this T-shirt for another few weeks. It miraculously looks and smells like it was just cleaned."

"This is the perfect base layer as it’s super lightweight and is anti-wrinkle and moisture-wicking. This can quickly become your new closet staple at home and on the road."

"I may hold off on washing this T-shirt for another few weeks. It miraculously looks and smells like it was just cleaned."

"Lightweight and breathable, this shirt has a perfectly soft feel. The thin material is moisture-wicking, making this great for layering or wearing on its own."

"Unbound Merino sits at the intersection of travel gear and luxe knitwear, offering wool garments in timeless styles. They use superfine premium Merino wool that’s Woolmark-certified."

"This shirt's wool fibers lock odor molecules within and only release them on washing — which means less washing and more wearing. That makes this the ultimate travel top."

About our wool

RWS (Responsible Wool Standard) certified, adheres to the welfare of the sheep and their land.

What people are saying

4.8

Rated 4.8 out of 5 stars

Based on 170 reviews

Slide 1 selected

How did you find the fit?Rated 0.3 on a scale of minus 2 to 2

Write a Review (Opens in a new window)

170 reviews

Sort

MA
Meredith A.
Verified Buyer
I recommend this product
What size did you buy? XL
Rated 5 out of 5 stars
9/26/26
Lovely for warmer weather
I love these pajamas. They aer perfect for warmer weather. Now that the weather is now, I'm putting them away for my next trip to warmer climes and spring.
How did you find the fit?Rated 0.0 on a scale of minus 2 to 2
Was this helpful?
CH
Cynthia H.
Verified Buyer
I recommend this product
What size did you buy? XL
Rated 5 out of 5 stars
9/20/26
Great
These are great comfy pants. I plan to use them mostly when traveling. Great fit.
How did you find the fit?Rated 0.0 on a scale of minus 2 to 2
Was this helpful?
SL
Sara L.
Verified Buyer
I recommend this product
What size did you buy? XL
Rated 5 out of 5 stars
9/19/26
Great PJs!
Super comfy PJs; packed down small and did not overheat while wearing these which happens frequently to my post-menopausal self.
How did you find the fit?Rated 0.0 on a scale of minus 2 to 2
Was this helpful?
RD
Risa D.
Verified Buyer
I recommend this product
What size did you buy? L
Rated 5 out of 5 stars
9/17/26
Simply the best and most comfortable!
Can't wait to get another pair.
How did you find the fit?Rated 0.0 on a scale of minus 2 to 2
Was this helpful?
JD
Julie D.
Verified Buyer
I recommend this product
What size did you buy? XS
Rated 5 out of 5 stars
9/13/26
Comfy
Comfy, tts, like the fact that I can take on trips and sleep multiple nights in them and not feel yucky. Plan on buying another set.
How did you find the fit?Rated 0.0 on a scale of minus 2 to 2
Was this helpful?

North America
USA Standard Shipping 2 to 6 business days - $4.99 for orders under $100. Free for orders $100+. Expedited Shipping - 1-4 business days - $14.65 FedEx 1 day delivery - Rate calculated at checkout FedEx 2 day delivery - Rate calculated at checkout	Canada Standard Shipping- 2 to 5 business days - $6.99 CAD for orders under $100 CAD. Free for orders $100+ CAD. Expedited Shipping - 1-4 business days - $14.65
International
Please note that international customers (outside of Canada and the United States) may be subject to taxes or duties upon delivery Europe Zone 1 Germany, Belgium, Croatia, Denmark, Estonia, Finland, France, Hungary, Ireland, Latvia, Luxembourg, Netherlands, Spain, Sweden, Switzerland, Poland, Portugal, Bulgaria, Greece, Italy, Malta, Austria, Cyprus Standard shipping ($200 and up) 2 to 3 weeks - FREE Standard shipping 2 to 3 weeks - $14.99 DHL Express Worldwide - 3-6 days - Calculated at checkout Europe Zone 2 Iceland, Lithuania, Norway, Romania, Slovakia, Slovenia, Czechia, Gibraltar Standard shipping ($200 and up) 2 to 3 weeks - FREE Standard shipping 2 to 3 weeks - $14.99 DHL Express Worldwide - 3-6 days - Calculated at checkout United Kingdom Standard shipping 2 to 3 weeks - FREE Standard shipping - (Duties and Taxes Paid) 2 to 3 weeks - FREE DHL Express Worldwide - 3-6 days Calculated at checkout	Australia, New Zealand Standard shipping ($200 and up) 2 to 4 weeks - FREE Standard shipping 2 to 4 weeks - $19.99 DHL Express Worldwide - 4-6 days - Calculated at checkout Japan, Hong Kong SAR, South Korea Standard shipping ($250 and up) 2 to 4 weeks - FREE Standard shipping 2 to 4 weeks - $19.99 DHL Express Worldwide - 3-6 days - Calculated at checkout Malaysia, Singapore Standard shipping ($250 and up) 2 to 4 weeks - FREE Standard shipping 2 to 4 weeks - $14.99 DHL Express Worldwide - 3-6 days - Calculated at checkout Rest of world Standard shipping 2 to 4 weeks - $19.99

Who is the recipient?

Free shipping on orders over $100

Home / All Products

Women's Ultrafine Merino Sleep Bottoms

Model Info +

Women's Ultrafine Merino Sleep Bottoms

Women's bottoms size guide

in

cm

1WAIST

2HIPS

3INSEAM

1 Waist Width

2 Hip Width

3 Thigh Width

4 Leg Opening

5 Inseam Length

North America

USA

Canada

International

Europe Zone 1

Europe Zone 2

United Kingdom

Australia, New Zealand

Japan, Hong Kong SAR, South Korea

Malaysia, Singapore

Rest of world

RETURNS & EXCHANGES

The Softness of Merino, Measured in Microns

Sleep Better In Merino Wool.

Nature's Miracle Fabric

Softer than cotton

Ultrafine Sleep Jersey

“The perfect T-shirt can see you through almost any situation, and Unbound makes a strong bid for the title with their chic Merino designs.”

"It's the most popular T-shirt in our Merino guide and well-loved by travelers. It's very soft and lightweight, and it packs down to a tiny roll."

“These tees have a sophisticated European elegance to them, thanks to both the material and design. Just looking at them makes you feel chic.”

“Between the flattering fit and the classic style, it's a great option for travel.”

"I may hold off on washing this T-shirt for another few weeks. It miraculously looks and smells like it was just cleaned."

"This is the perfect base layer as it’s super lightweight and is anti-wrinkle and moisture-wicking. This can quickly become your new closet staple at home and on the road."

"I may hold off on washing this T-shirt for another few weeks. It miraculously looks and smells like it was just cleaned."

"Lightweight and breathable, this shirt has a perfectly soft feel. The thin material is moisture-wicking, making this great for layering or wearing on its own."

"Unbound Merino sits at the intersection of travel gear and luxe knitwear, offering wool garments in timeless styles. They use superfine premium Merino wool that’s Woolmark-certified."

"This shirt's wool fibers lock odor molecules within and only release them on washing — which means less washing and more wearing. That makes this the ultimate travel top."

About our wool

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What people are saying

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