The women's KARHU Fusion 4.0 is a perfect choice for runners in search of neutral running shoes that also deliver the speed and performance of fast running shoes. The redesigned Fusion 4.0 offers a plush, responsive ride that’s ideal for neutral runners. With new features and enhancements, it excels at creating a smooth heel-to-toe transition, ensuring a dynamic and responsive feel underfoot, regardless of your pace. 

The update incorporates soft IdealKnit mesh for enhanced breathability and comfort, while the nitrogen-injected AeroFoam midsole provides increased rebound. Additionally, the deflection channel at the base of the midsole improves impact absorption, delivering an even more cushioned running experience.

The KARHU Fusion 4.0 is an all-in-one option for runners who value comfort, performance, and responsiveness. At KARHU, we recognize that every runner’s feet are different, and this understanding shaped the latest updates to the Fusion 4.0.

Technologies KARHU Fusion 4.0
- Fulcrum + Propulsion Unit
- IdealKnit
- Ortix Fit
- Nitrogen-infused AeroFoam midsole
- M-Lock lacing system

Weight US8: 250g / 8.8 oz
Heel-to-toe drop: 6mm

RETURNS AND REFUNDS

We accept returns of all items within 15 days of receiving the order with the right to full refund minus a return fee of £5.00. A return label by Royal Mail is included in your shipment and a refund for the amount you paid for the returning item, minus a £5.00 shipping fee per return will be charged. If you are missing the return label or need to make a second return, please email our Customer service department at help@karhu.com to provide you a new return label.
 
We accept returns of all items within 15 days of receiving the order with the right to full refund of the product minus a £5.00 shipping fee per return.

Your return will be accepted if the goods are returned in the same condition as when you received the order. If the item has been used, damaged, washed, altered or missing tags/labels (for apparel), we are entitled by law to charge you a fee for the depreciation of the item. 

We will process your return and issue a refund within maximum of 30 days. Refunds will be issued via the original method of payment.

Returns from Germany, France, Austria, Ireland, Italy, and Poland:

To generate the return label, please visit the following webpage: https://karhu.returnmyorder-international.com. You will need your order number, and the post code/email address associated with your order to initiate your return and generate a label. You can find the order number either on the paper packing list inside the delivery box, the digital invoice sent to your email or on the order confirmation when you placed the order. (see below)

ATTENTION: Once generated, your return label can be used within maximum 5 working days. When your label expires, please contact help@karhu.com.

Order confirmation

Paper packing list

Digital invoice

FedEx Home Collection

For returns from Austria and Italy, you may request the FedEx Home Collection service in https://karhu.returnmyorder-international.com.

ATTENTION: FedEx Home Collection will be arranged automatically for the next available working day during business hours.

If you missed the FedEx Home Collection, within 5 working days you can drop off the parcel at the nearby FedEx point (here: https://local.fedex.com/) or reschedule a new pickup, following the instructions below:

• Go to your local FedEx website: fedex.com
• Click the “Shipping” tab on the top bar;
• Select: “Schedule and Manage Pickups”;
• Click “Let’s Start” under the “Drop-off or Collection”;
• Enter the tracking number from your FedEx label and your post code;
• Then select “Arrange A Pickup” and complete all the necessary information.

EXCHANGES

We currently don't do exchanges of products at Karhu. If you would like to change your item for a different color or size, please return your item and place a new order. 

Size Guide Running Women

STEP 1

Place a piece of paper on the floor with one end against the wall. Put your foot on the piece of paper with your heel against the wall.

STEP 2

Take a pencil and mark the end of your longest toe on the paper. Repeat for your other foot.

STEP 3

Measure in cm from the wall (heel) to the longest point (toe). Take the larger measurements. Than take what you measured + 0.5 CM and compare it with our shoe sizes in the size chart.