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Woolly Core-warmer

Woolly Core-warmer
Woolly Core-warmer
Woolly Core-warmer
Woolly Core-warmer
Woolly Core-warmer

Woolly Core-warmer

Stock Status: In Stock
Super cosy and stretchy ultra-warm core-warmers.
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black (merino)
white (angora)
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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. 

Really really extra warm haramaki. Available in black and natural (undyed) white

Simple stretchy-knitted rib tube. Unisex. Also known as a kidney-warmer, back-warmer or belly-band.

Fibre content: Merino with lycra (black) and Angora/wool mix (natural/white) 

Machine wash but on wool wash cycle. Keep spin short then gently pull back into shape whilst drying. Air dry.

All sizes measured around the waist.
small = 28"-33"
medium = 34" - 38"
large = 39"-44"
XL = 45"-50"
2 XL = 51"-55"
3 XL = 56"-60"


  • Brand:
    Royal Angora
  • Weight:
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Customer reviews

(12 Customer reviews)
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Showing 1 to 5 (12).


This is a lovely warm layer to wear over or under (it is soft against the skin). I am a size 10 and I ordered the medium but to be honest, a bigger one would have been slightly better. So it just comes up a little small. Otherwise, perfect.

Cathryn Newman | Swanage | May 2022

Core warmer...small, light but effective.!

I don't like too much weighty or bulky gear, but usually have lots of this is perfect for me. I sent one to a friend who lives in Switzerland and snow walks and swims in the lake year round..she said that it's so snug she wearing it for lots of outdoor stuff.

Lisa Ransom | | January 2022

Snug as a bug

Lovely and warm. Helps with warming up after a chilly swim. Would love a whole suit made out of it.

Andrea Crisp | London | December 2021

Sustainably made and natural

So soft and stretchy , easy to get on

Lisa Bates | Surrey | November 2021

Great so warm and snuggly!

Perfect to slip on after a cold swim to keep cosy and warm .

Jacqui Phelps | Shoreham by sea | October 2021

Showing 1 to 5 (12). Page 1 of 3.