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Women's Ultrafine Merino Sleep Bottoms

4.8
Rated 4.8 out of 5 stars
118 Reviews
$138
$138
100% Merino Wool. 165gsm.
Navy
Navy
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Model is 5'11", has a 26" waist and is wearing size S

Women's Ultrafine Merino Sleep Bottoms

4.8
Rated 4.8 out of 5 stars
118 Reviews
$138
$138
100% Merino Wool. 165gsm.

Experience better sleep with the comfort of Merino wool. These ultra-soft, temperature-regulating pajama bottoms are designed to enhance your rest, keeping you cool when needed and cozy throughout the night. Pair with our Ultrafine Sleep Top for the ultimate sleep setup.

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Color Navy Only 9 left!
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Experience better sleep with the comfort of Merino wool. These ultra-soft, temperature-regulating pajama bottoms are designed to enhance your rest, keeping you cool when needed and cozy throughout the night. Pair with our Ultrafine Sleep Top for the ultimate sleep setup.

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  • Odor resistant Odor resistant
  • Temperature regulating Temperature regulating
  • Wicks moisture Wicks moisture
  • Perfect for packing Perfect for packing
Fabric and Details
  • 100% Merino Wool
  • 165gsm
  • Fiber micron: Ultrafine 15.5
15 µm
15.5 µm
25 µm
Care instructions
  • Machine wash in cold gentle cycle
  • Wash with like colors inside out
  • Do not bleach 
  • Do not tumble dry 
  • Iron in low temperature 
  • Lay flat to dry in shade
Merino Care 101
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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.
Sleep Better In Merino Wool.
Nature's Miracle Fabric

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

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.

Easy care

Easy care

You won’t have to wash this pair of pants much at all. However, when it comes time for a refresh, simply add it to your load at the cold temperature setting and then lay flat to dry.

“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."

Travel Leisure
WIRED
Forbes
Lonely Planet
Fast Company

"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."

Travel + Leisure
Fast Company
Conde Nast Traveller
Bustle
Refinery29

About our wool

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

What people are saying

4.8
Rated 4.8 out of 5 stars
Based on 118 reviews
Slide 1 selected
Total 5 star reviews: 105 Total 4 star reviews: 10 Total 3 star reviews: 0 Total 2 star reviews: 1 Total 1 star reviews: 2
How did you find the fit?Rated 0.4 on a scale of minus 2 to 2
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118 reviews
  • CL
    Christine L.
    Verified Buyer
    I recommend this product
    What size did you buy? XL
    Rated 5 out of 5 stars
    4/16/26
    Women's Ultrafine Merino Sleep Bottoms

    These pj bottoms are so comfortable! I was worried about the wool being itchy, however that is not the case at all. They wick away any sweat if you overheat at night. I am already purchasing my next pair!

    How did you find the fit?Rated 2.0 on a scale of minus 2 to 2
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  • EY
    Elizabeth Y.
    Verified Buyer
    I recommend this product
    What size did you buy? XS
    Rated 5 out of 5 stars
    4/11/26
    Most comfortable pajamas ever

    These are the most comfortable sleep bottoms I've ever worn. I bought these to use for travel but they've become my go-to pajamas. After reading the reviews, I sized down. The 28" inseam full length on me (not too long). The merino is lightweight and comfortable. Waiting for the top to be restocked to have a matching set.

    How did you find the fit?Rated 2.0 on a scale of minus 2 to 2
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  • RD
    Rachel D. R.
    Verified Buyer
    I recommend this product
    What size did you buy? M
    Rated 5 out of 5 stars
    4/10/26
    I love these pyjamas!

    They feel the perfect temperature regardless of climate, they drape beautifully and feel beautiful against my skin. I often reach for them for lounging, and they always feel clean.

    I’m a medium trending towards large, and these fit very comfortably, not at all tight.

    How did you find the fit?Rated 1.0 on a scale of minus 2 to 2
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  • LW
    Lauren W.
    Verified Buyer
    I recommend this product
    What size did you buy? XL
    Rated 5 out of 5 stars
    4/8/26
    very comfortable

    I wasn't sure about wool for sleeping but I've taken the sleep top and bottoms on a couple of trips now and really liked them. Very soft and comfortable.

    How did you find the fit?Rated 0.0 on a scale of minus 2 to 2
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  • TE
    Tonya E.
    Verified Buyer
    I recommend this product
    What size did you buy? L
    Rated 5 out of 5 stars
    4/3/26
    My New Best Friend!

    The Ultrafine Merino Sleep Bottoms are so soft and comfortable! I get hot when I sleep so I was a little skeptical about sleeping in wool, but I was pleasantly surprised to learn the pants didn't make me hot. They're easy to care for and feel soft and fluffy right out of the dryer. I love the top, too! Great purchase.

    How did you find the fit?Rated 0.0 on a scale of minus 2 to 2
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