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Beat the after-drop with a cotton/lycra core-warmer
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A key bit of our winter swim kit - Core-warmer or Haramaki. Also known as: kidney warmer,  belly-warmer, bump band, tummy tube, body warmer, back-warmer...

The haramaki is a traditional Japanese item of clothing. A tube of soft, stretchy fabric that you pull on and wear around your middle. This 'core warmth' effect spreads to the rest of the body. Fantastic for a quicker recovery when getting out of the sea. Helps with the 'after-drop' effect of cold water swimming and allows your core temperature to recover in less time. 

These haramaki core-warmers from Brighton based sea swimmer NukuNuku will keep you warm and keep their shape wash after wash.

May aid digestion and ease lower back pain, covers you up during sports such as pilates, cycling and yoga and allows you to stay outside for longer and cover your muffin top when required! Warning, you can become addicted - we wear ours 24/7 outside of summer...

Made in the UK and built to last from high quality soft cotton/Lycra (92% cotton, 8% lycra 190gsm).

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Based on 8 review(s)
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Val - St. Austell

Just ordered another one

I'm really pleased with my pink Haramaki. I ordered it as part of my sea swim change gear and it's working really well as a dual purpose garment (boob tube/ belly warmer). It's keeping its shape well, is super stretchy and, most important, is lovely and warm.

Julian - Hythe

I placed an order for several members of my family who all love them

My sister lives in windy Hythe and first gave me a vague description of what turned out to be your core warmers/haramakis. A quick wiki later and I arrived at your website and was pleased to see that you're based in another breezy seaside place, where my daughter lives. Although I'd never heard of core warmers, I placed an order for several members of my family who all love them and find they're really effective - I just need to get one for myself now!

kate webster - hove

Essential and well loved:)

Wasn't sure what the point was until I borrowed one! It somehow warms you up immediately, you can tuck hot water bottle inside and it stay snug. Also find myself wearing it on cold winter days especially on long walks.

Claudine - Hove

Lovely warm middle

Love it. Keeps me warm after a swim or on a chilly day. Adds a bit of colour between my dark layers!


Excellent idea for post swim and for chilly bike rides

I wasn't really sure I needed one of these, but now I have one, I want another! Excellent for warming up after a chilly swim, but also found it brilliant to wear on winter cycle rides, particularly when cycle tops ride up.

Sarah -

I was sceptical at first but now I swear by these. They can make all the difference when warming up after getting out of the water. Great for period pain too! Shove a mini hot water bottle in there...fantastic.

Samantha Wilson - Brighton

A small thing that makes a big difference. An essential peice of kit to help you warm up quickly after swim. Lovely quality and a good price.

Elaine - Cumbria

I swear by these in the winter - makes a huge difference. Really helps you warm up quicker after a swim. I wear mine ALL THE TIME :)