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Woolly Core-warmer - black
Woolly Core-warmer - black
Woolly Core-warmer - black
Woolly Core-warmer - black
Woolly Core-warmer - black
5 reviews

Woolly Core-warmer - black

Super cosy and stretchy ultra-warm core-warmers.

Product information

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 with Angora. Black. 

Angora has been shown to be up to 3 times warmer than sheep’s wool and possesses unique thermal properties.
Super soft and cosy. Great for lower back pain. Wearing Angora wool clothing can improve blood circulation. Angora can be beneficial to people with painful joints, sciatica, arthritis, muscle tension as it helps to maintain a warm body temperature. More information here

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

Fibre content: 46% angora/37% lambswool/9% polyamide/8% elastane

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"

Made from Angora with the highest welfare standards. 


Based on 5 reviews
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Jeannette - Brighton

Not only for after swimming!

I love my haramaki, and nor wear it not only after swimming, but also when working from home, sitting still next to a drafty door. Very comfy and warm!

Maria Villa Vine - Isle of Wight

Game changer!

OMG!! I absolutely love my hamakari!!

It is so easy to slip on after a cold dip in the sea & its incredibly toasty!!!

I keep it on ALL day currently as I love it so much!! Go on & do yourself a favour!

Lucy - Hove

The best!

It's the best! And not just for introducing the novelty of the word "haramaki" into your life. I'm someone who really feels the cold and gets the shivers even after an August sea swim so thought I'd try this to help with the warm up after winter swims. Makes such a big difference to warmth that it's no longer just a post-plunge staple but something I wear pretty much every single day, stealthily donned between layers! So helpful for battling through winter.

Ruth - Hove

Haramaki Core Warmer

Who knew what a game changer the angora Haramaki would be?! As someone who shivers pretty much all year round, this is an essential piece of kit, not just for after a cold water swim either. I couldn't and won't ever be without mine, whatever the temperature. Thanks Seabirds Ltd!

Thea Wates - Brighton

I love my wooly core-warmer

This is one of the most essential piece of kit you will ever need if you want to swim through winter. It really makes a difference and helps you warm up more quickly. It's the first thing I put on after I have got out of all my wet swimming gear and I love it. The fit is great and I can't recommend it enough.

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