Sweaty Betty
Therma Boost Thermal High Waisted Leggings
£110
Product code: T129537S
About this style
Feel snug on cold-weather runs in these thermal leggings from Sweaty Betty. They're made from stretchy fabric with a brushed fleece lining and an elasticated high waist. Part of the brand's innovative HeatProtect range, these leggings offer temperature regulation and moisture-wicking protection whatever the weather. They're finished with side slip pockets and a back zip pocket.
Curated By
Details & care
Details & care
Fit and style
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Skinny fit
•
Elasticated waist
•
Mid rise
Composition
76% polyester, 24% elastane
Care
Machine wash according to instructions on care label
Delivery, collection & returns
Delivery, collection & returns
Standard
Free over £60, or £3.99
UK returns
Free. Returns can only be arranged via postal options. Exclusions apply Full delivery and collection information Our returns policy
Exclusions apply
About Sweaty Betty
About Sweaty Betty
Empowering women through workouts and beyond since 1998, Sweaty Betty’s iconic fitness gear will support you in reaching your fullest potential.
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Reviews (31)
A Runner's Best Friend on a Chilly Winter Run
Originally posted on sweatybetty.com
Yes, I recommend this
This is my FIRST Running Leggings from Sweaty Betty. I wore it this morning for an 18 KM run, on a chilly Winter day in Canada. With the windshield it felt like -14. The leggings are like butter on my skin! They kept me warm. And in true Sweaty Betty signature style, they are so stylish. On a Grey Winer day this beautiful Green colour made me happy :) I am so grateful for this company for continuing to support athletic people, participating in physical movements looking so fine! As a yogi, I also practice in Sweaty Betty clothes. Thank You! I am proud to wear your clothes on my runs and in my yoga practices.
Helpful?
A good purchase
Originally posted on sweatybetty.com
Yes, I recommend this
Nice quality. Very comfortable. I brought them when you had them on offer.
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Winter leggings
Originally posted on sweatybetty.com
Very comfortable and side pockets are very handy Lovely and warm for winter runs
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Great quality perfect for autumn/winter runs
Originally posted on sweatybetty.com
Yes, I recommend this
These are the best running leggings. They are comfortable, soft, have functional side pockets and the zipped back pocket. The reflective seams are perfect and don't wash off like the printed ones. It's my second pair because I loved the first ones so much and got another colour. They are thermal but may be not for extreme cold. For a milder UK winter runs they are perfectly fine
Helpful?
Comfy warm leggings that stay up
Originally posted on sweatybetty.com
Yes, I recommend this
Lovely warm leggings perfect for running on colder days, I should maybe have got the smaller size as they go a little baggy round my knees and aren’t as flattering as the power ones I normally get but they stay up well with phone and various other things in the pockets. Also like that they have pockets on both sides on these ones. Don’t really like the white over locked stitching though.
Helpful?
Supersoft fabric and great fit
Originally posted on sweatybetty.com
Yes, I recommend this
I love them! Yet to test how much of a thermo boost they offer compared to regular leggings, but they have a great form and the fabric is super soft to touch. Seemed to be slightly looser than Power Gym Leggings in the same size but I would still consider them a fit.
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So cosy. Just love them!
Originally posted on sweatybetty.com
Yes, I recommend this
Just love Sweaty Betty clothes. The fabric and fit is always amazing. Just love these thermal leggings. I;ve bought them for a trip to Antartica but I just love to live in them at home! So comfortable and a great fit. And so cosy!
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Ideal for cold winter walks
Originally posted on sweatybetty.com
Yes, I recommend this
Ideal for the cold weather we have had recently (0-3degrees). Great for Irish weather in general and has pockets!
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Soft and comfy
Originally posted on sweatybetty.com
Yes, I recommend this
Not worn yet but looked and felt good at the try on stage. I’m only 5’3” and the full length were better for me despite the advice on the website (unless you want them well above the ankle). The 2 pockets are a great addition.
Helpful?
Sizing issues...
Originally posted on sweatybetty.com
Yes, I recommend this
I love the Thermaboost leggings which I bought a couple of years ago. When the temperature drops I wear on repeat and they're still going strong, so very pleased to buy a 2nd pair in the same size at sale price. However, I was really surprised by a significant difference in waist size - compared to my old pair of Thermaboost leggings they were 5cm smaller measured side to side and the waistband 3cm shorter. They were also significantly smaller in the waist than my power leggings in the same size (Medium). Swapped them for a size Large which fit like the previous medium - my usual size for trousers is UK 10. Other than the sizing issues I love the green colour and they are super cosy for lounging, pilates or warm up trousers for tennis.
Helpful?
No more frozen bum!
Originally posted on sweatybetty.com
Yes, I recommend this
These are truly amazing! As soon as you put them on you can feel how warm they are. Love the two side pockets and reflective seams for extra visibility. Was recently out in -4 degrees in these and no more frozen bum!
Helpful?
Not warm enough
Originally posted on sweatybetty.com
No, I don't recommend this
Got these for winter running. They fit like the power leggings and are the same thickness. The only difference is the texture of the fabric, which is slightly brushed on the inside. Not any warmer than the power leggings so I’m returning them. Disappointed because I love the cut.
Helpful?
Two pockets!
Originally posted on sweatybetty.com
Yes, I recommend this
I love the two pockets! Usual high quality thermal leggings
Helpful?
Perfect leggings for the cold.
Originally posted on sweatybetty.com
Yes, I recommend this
Lovely warm leggings. True to size and so comfortable. Great that they have pockets too.
Helpful?
Gorgeous colour
Originally posted on sweatybetty.com
Fabulous warm legging perfect for this time of year
Helpful?
Love them
Originally posted on sweatybetty.com
Yes, I recommend this
These are my second pair. I love them. Fit well. Warm & soft material. I appreciate they have a waist cord. I wear them for tennis, and the side pockets are great for storing tennis balls.
Helpful?
Fabulous for walking
Originally posted on sweatybetty.com
Yes, I recommend this
I was recommended these by a friend and they do not disappoint. They are so comfortable and I’m living in them for dog walks on these chilli days. I’m a size 12/14 and went for the Large which are perfect.
Helpful?
Soft, warm and deep pockets
Originally posted on sweatybetty.com
Yes, I recommend this
Really soft, cosy and warm. Fit me perfectly and look high quality. Am particularly chuffed with all the pockets!
Helpful?
Defo Therma boost
Originally posted on sweatybetty.com
Yes, I recommend this
I bought these for outdoor Padel. Game changer for the winter months! So much warmer.
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Love them!
Originally posted on sweatybetty.com
Yes, I recommend this
Love them. Comfy and warm and great colour. Perfect dog walking attire for colder days.
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