The Supima® Cotton Travel Sleep Sack
A Pristine Cocoon of Luxury, Wherever You Rest
Your own layer of fine cotton sateen, for travelers who refuse to compromise on comfort or cleanliness.
Machine washable
The UpsideLuxe Experience
Pristine Comfort
Your sleep space should be entirely your own. The UpsideLuxe sleep sack creates a clean, personal layer between you and the unfamiliar, so rest feels calm, assured, and uninterrupted.
Elevated Ease
Luxury should never feel complicated. Designed to fold neatly and travel effortlessly, the UpsideLuxe sleep sack integrates seamlessly into your routine, wherever you go.
From Fellow Travelers
Each received a sleep sack to try.
“I always get a little nervous in hotels and like the idea of staying ‘clean.’ … I slept peacefully all night!”
— Erika
“The material is soft and feels very high end, like it will hold up well for years and years. … It is worth the investment.”
— Lara
“I love having soft luxurious sheets with me wherever I go.”
— Kate
“It’s so easy to pack… I never travel without it.”
— Ada
Why Supima
Less Than 1% of the World’s Cotton
Supima is among the rarest cottons in the world. This extra-long-staple fiber is grown on about 500 family farms in just four American states, and makes up less than 1% of the world’s cotton.
Those longer fibers spin into a finer yarn, up to 45% stronger than regular cotton. Woven into a smooth sateen, it feels silky and cool against the skin, resists pilling, and grows softer with every wash.
It even arrives home the same way it travels: in a matching Supima cotton sateen envelope, compact enough for any carry-on.
Thoughtfully designed, down to every detail
Soft Coverage
A softly structured top flap for comfort without feeling restrictive.
Freedom of Movement
A gusseted side lets you shift naturally through the night.
Effortless Access
A smooth, discreet zipper for clean, uninterrupted entry and exit.
Nighttime Essentials Pocket
A crafted interior pocket with a foldover top keeps personal items close at hand.
Room to Settle In
Generous proportions offer space to stretch and settle in comfortably.
Tap the drawing to enlarge
Five-star comfort. Entirely yours.
Why I Created UpsideLuxe
I have always loved to travel. But even the finest hotel sheets have been slept in hundreds of times before, by strangers. I wanted something pristine and entirely my own, with Supima cotton against my skin, wherever I rest.
With warmth, Vanessa · Founder
Designed in Albuquerque, New Mexico. Woven and sewn from American Supima cotton in Tamil Nadu, India.
Questions, Answered
A travel sleep sack is a personal sleeping layer that zips closed and fits between you and the bedding wherever you stay. The UpsideLuxe sleep sack is made from 100% Supima cotton sateen, so it feels like fine hotel linen rather than travel gear. It's your own clean, familiar layer, every night of the trip.
Supima is an extra-long-staple cotton grown only in the United States, and less than 1% of the world’s cotton qualifies. The longer fibers make a yarn that is smoother, stronger and more luminous, so the fabric feels silky against your skin, resists pilling, and becomes softer with every wash.
Because you know exactly how clean it is. A sleep sack gives you a layer that only you have slept in, washed in your own laundry, with your own detergent. Even when you can't know the history of the bed beneath it, the fabric against your skin is entirely yours: breathable, familiar, and clean from the first night to the last. And not every hotel bed lives up to its thread count. UpsideLuxe is made from 100% Supima cotton sateen, the rare, extra-long-staple cotton used in the world's finest hotel linens, so you sleep on something exceptional wherever you stay.
Sleeping bag liners are built for campsites and hostels, where the priorities are compact size and synthetic performance. UpsideLuxe is built for comfort. It's cut from 400-thread-count Supima cotton sateen, finished with French seams, and sized generously at 45" × 90" so you can move freely through the night. It even holds your pillow in an integrated back pocket.
Yes. The UpsideLuxe sleep sack is cut generously at 45" × 90", with a 10" expansion gusset along one side, so there is room to stretch out and turn over. Erika, who is 6 feet tall, put it simply: “It is plenty long. I am 6 feet tall and didn’t feel crowded.” (Erika received a sleep sack to try.)
Very little. The UpsideLuxe sleep sack arrives in a matching Supima cotton sateen envelope that measures 14" × 16" and packs flat, so it slips into a suitcase or carry-on alongside everything else.
No. The sleep sack is machine washable, and Supima cotton grows softer with every wash rather than wearing thin. Lara put it simply: “I was happy to find out that when washing it didn’t change or compromise the quality of the sleep sack.” (Lara received a sleep sack to try.)
More questions? See Details and Care