Theory Underwear & Nightwear for Women

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Theory is an American clothing brand that specializes in high-end trousers. The label developed an innovative stretch fabric for its first women's pants and later applied similar technology to its men's collections. These simple, chic, functional designs are essential wardrobe staples.
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Underwear & Nightwear
Basques
Bodysuits
Bras
Camisoles
Chemises
Pajamas
Panties
Robes
Socks & tights
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On sale
Seasons
FW25
SS25
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Customer stories
Join thousands of shoppers discovering the thrill of luxury finds at italist. Real reviews, genuine luxury, always at unmatched prices.
Gregory S.
Great shopping experienceI ran across Italist.com site while doing a specific search on the internet for a Dolce and Gabanna item. They didn't have the item I was looking for, but I browsed there sale items while I was there. The site works well and I enjoyed the shopping experience. I found a great pair of shoes that I ordered. The check out and delivery for the site was easy. The delivery arrived actually faster than I expected. I didn't have to contact customer service, which I consider a real bonus.
Andrew M.
Triple Stich successI was looking for a pair of Zegna shoes that I saw at the mall here in Houston and italist had the same pair but saved me 33%. I am very happy with the service and quick shipping. It's always so much fun finding a great deal.
Addie T.
Beautiful Shoes that were gorgeously packagedThe shoes arrived so quickly and in beautiful packaging. I was nervous about ordering from them, but it exceeded my expectations. I can’t wait to wear my Manolos. Dust bags and everything normally expected were included.
Yuhang Q.
Speedy Costumer ServiceThe boutique only sent me half of my order, italists's CS dealt with the issue within 24 hours despite the timezone difference, will come back again for sure.
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