Browse 38 discounted Sweaty Betty sleepwear & Undergarments — up to 80% off. Find the best deals on Sweaty Betty sleepwear & Undergarments across UK retailers, filtered to your size.
Showing 38 of 38 sleepwear & Undergarments, sorted by deepest discount.
About Sweaty Betty
Sweaty Betty is a British activewear brand founded in 1998 by Tamara Hill-Norton, headquartered in London. The brand designs womenswear activewear and athleisure with a focus on technical fabric quality, considered design, and pieces that span performance and everyday wear. Sweaty Betty's product range covers leggings (including the iconic Power Leggings), sports bras, tops, jackets, joggers, and accessories, with the brand particularly known for its Power Leggings range, considered fabric technology, and inclusive sizing approach. The brand operates UK retail through standalone stores in London and other major cities, alongside sweatybetty.com. Sweaty Betty was acquired by Wolverine Worldwide in 2021 but continues to operate under its own name and identity. The brand's positioning sits in the premium activewear market, appealing to customers seeking elevated, technical pieces beyond mass-market athleisure. Sweaty Betty deals typically appear in regular percentage-off promotional events, end-of-season clearance, and Black Friday.
Sweaty Betty sizing guide
Sweaty Betty sizing generally runs true to UK standard, with the brand offering UK sizes XXS–XXL plus extended sizing on many styles. Power Leggings are designed for compressive support and run true to size, while relaxed-fit pieces (including joggers and sweatshirts) tend to fit slightly relaxed.
When does Sweaty Betty go on sale?
Sweaty Betty runs major end-of-season sales typically in late June/July and December/January, alongside recurring percentage-off promotional events, Black Friday, and a continuous Sale section featuring past-season pieces.
Frequently asked questions
Are Sweaty Betty Power Leggings true to size?
Sweaty Betty Power Leggings are designed for compressive support and generally fit true to UK size. The brand offers extended sizing including XXS–XXL plus on many ranges.
Is Sweaty Betty a British brand?
Yes — Sweaty Betty was founded in 1998 by Tamara Hill-Norton in London. The brand was acquired by Wolverine Worldwide in 2021 but continues to operate under its own British identity.
When does Sweaty Betty go on sale?
Sweaty Betty runs major end-of-season sales in late June/July and December/January, alongside recurring percentage-off promotional events, Black Friday, and a continuous Sale section.
Does Sweaty Betty offer plus sizes?
Yes — Sweaty Betty offers extended sizing including XXS–XXL plus on many of its activewear ranges, with the brand pursuing an inclusive-sizing approach across its product categories.
Power Contour Zip Bra — £12.00 
Super Soft Mesh Workout Bra — £15.00 
Power Racerback Bra Vest — £15.00 
Slip Stream Run Zip Up — £25.00 
Power Icon Running Bra — £19.50 
Spirit Restored Yoga Bra — £12.00 
Balance Bandeau Strapless Bra — £6.00 
Asymmetric Sculpt Bra — £15.00 
Power Medium Support Seam-Free Bust Bra — £14.50 
Power Contour Zip Bra — £20.00 
Super Soft Reversible Yoga Bra — £20.00 
Glow Flex Rib Bra — £15.00 
Super Soft Crop Strappy Back Workout Bra Vest — £24.50 
Super Soft Crop Strappy Back Workout Bra Tank — £26.00 
Super Soft Reversible Yoga Bra — £22.00 
Mindful Seamless Yoga Bra — £18.00 
Spirit Restored Yoga Bra — £16.00 
Asymmetric Sculpt Bralette — £20.00 
Solstice Strappy Back Bra — £14.00 
Foundation Seamless Padded Yoga Bra — £16.00 
Solstice Strappy Back Bra — £14.00 
Power Racerback Bra Vest — £27.50 
Power Contour Plunge Bra — £30.00 
Ultimate Studio Yoga Racerback Bra — £20.00 
Power Pro Running Bra — £32.50 
Asymmetric Sculpt Bra — £25.00 
Asymmetric Sculpt Bra — £25.00 
Power Contour Plunge Bra — £30.00 
Stamina Square Neck Bra — £19.00 
Soft Ribbed Bra — £22.50 
Soft Ribbed Bra — £22.50 
Power Pro Running Bra — £42.00