Koji core warmer
Koji core warmer
Koji core warmer
Koji core warmer
Koji core warmer
Koji core warmer
Koji core warmer
Koji core warmer
Koji core warmer

Koji core warmer

Regular price£18.00
Tax included. Shipping calculated at checkout.

  • In stock, ready to ship
  • Inventory on the way

The Koji is a snug and stretchy, super-soft waist warming band. Pull this on after a cold swim and it will add an extra insulating layer to your core to help heat you through. Lots of warm layers are the best way to heat up slowly after chilly dips and this is a perfect addition to that layering process. It's so easy to step into, so cold, fumbling hands are not a problem. Wear it next to your skin for a soft and warm base layer.

Get cosy in a Koji! You'll end up wearing it all day - not just post swim!

Available in black, grey and beige

Size Guide

The below is a guide but if in doubt size up.


waist 60-72cm


UK size 6-10


waist 73-82cm


UK size 12-14


waist 83-96cm


UK size 16-18


New sizing coming next year

Fabric composition

30% cashmere
55% polyester
10% nylon
5%  spandex (Lycra )

Care of your Koji

Machine wash max. temperature 30 Celsius degree

Wash with like colours / No Bleach / Hang to Dry / Do not Tumble Dry  / Cool Iron 



Delivery & Postage Charges

The lead time between receipt of your order and dispatch is normally 24 hours, with a maximum of 72 hours. The brand will inform the Operator (The Outdoor Swimmer Shop) within 24 hours if they are unable to fulfil any orders received and we will contact you.

Shipping Charges to the Customer:


UK £3.99

EU £7.99

Rest of the World £14.99

Magazine (Only):

UK £1.00

EU £2.50

Rest of the World £3.50

We will only refund any shipping costs, including the cost of returning your goods, if we shipped an incorrect product or the product is found to have a genuine fault or is otherwise imperfect. Unsuitable wear or intentional damage will not be regarded as a fault. If you are claiming that your purchase was faulty, we will inspect your returned item(s) and let you know within 10 days whether we agree or if we regard the product as not faulty. 

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Recently viewed