lady in a yellow changing robe and furry hat with moose antlers wearing a black knitted core warmer base layer, the Koji Luxe
black knitted core warmer, the Koji Luxe
black knitted core warmer in 4 sizes M, L, Xl and XXL
close up of a black core warmer, the Koji Luxe, showing the 5mm thickness

Koji Luxe core warmer

Regular price£19.00
/
Tax included. Shipping calculated at checkout.

Size
Color
  • In stock, ready to ship
  • Backordered, shipping soon

The Koji Luxe is an extra thick, snug and stretchy waist warming band. Inspired by the Japanese tradition of wearing a kidney warmer, the Koji Luxe is designed to add an extra-thick, insulating layer to your core to help heat you through after outdoor swimming. Lots of warm layers are the best way to heat up slowly after chilly dips and this wool-blend base layer is a perfect addition.

It's so easy to step into - so cold, fumbling hands are not a problem. It also doubles up nicely as a modesty cover as you easily pull it up over your boobs when changing.

Wear it next to your skin for a soft and super-warm base layer.

Get cosy in a Koji! 

Size Guide

The below is a guide but please note that the Koji Luxe is very stretchy and it is possible to sometimes size down for a snugger feel.

Size

Waist in cm

Waist in inches

UK dress size

M

60-72

23-28"

6-10

L

73-82

29-32"

12-14

XL

83-96

33-38”

16-18

XXL

97-111

31-44”

20-24

 

 

 

 

Shipping Policy

At the Outdoor Swimmer Shop, we carefully curate a collection of high-quality products from independent brands who share our love of life in and around the water. When you place an order, your items are shipped directly from our brand partners — so you can discover a wide variety of products in one place, while still supporting small businesses.

UK Shipping

  • Standard delivery: £4.99 (whether you order one item or a basket full, you’ll only pay a single flat-rate shipping fee at checkout).
  • Delivery time: Most orders arrive within 2–5 working days. Many of our partners dispatch quickly (same or next day), while handmade or made-to-order items may take a little longer. If an item is unavailable or there are any unforeseen delays, we’ll contact you straight away.
  • Outdoor Swimmer Magazine: Postage is charged separately at £1.75 (UK only).

International Shipping

  • Availability: Most of our brand partners currently ship within the UK only. However, a growing number are able to ship worldwide.
  • Brands currently shipping worldwide include: Arvor Life, Bobbies, Booicore, Brighton Water Shoes, diptribe®, Mor Swimmy, North Coast Maid, Silk & Lawn and Warmcor.
  • Charges:

·       EU: £8.99

·       Rest of World: £14.99

Customs & Duties
If you’re ordering from outside the UK, please note that customs duties, taxes, or import fees may apply. These are set by your local customs authority and are not included in our prices or shipping charges. You’ll be responsible for paying these directly to the courier or your local government before delivery can be completed

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