On some big events such as Black Friday, Valentine's Day,... KOS will constantly offer up to 50% discount or more, so all customers can purchase well on their budget without worry.

In case you enter a discount code during checkout that doesn't exist or isn't currently active, then you can see the message: “Unable to find a valid discount matching the code entered”.

To use the KOS coupons on their website, you need to meet the conditions:

•  The items you choose must meet all coupon requirements as explained in the Terms and Conditions.

• The coupon has not expired. 

• The seller uses the KOS checkout system or a customized checkout system that accepts the coupon.

Please check out KOS's site to be sure that there are available KOS coupons for promotions or Customer Service at that time. In case you are chosen to obtain those available coupons, you may receive your coupon by email, or a mailed catalog or postcard.

Once you find available coupon codes and are approved by the KOS official store, you can submit them to us at Coupon Submission. We are not responsible for the reliability of coupons provided by customers.

Our advice for you to use KOS Coupon effectively is to choose the right day.
Like thousands of other consumers, the time of promotion is when they choose to
shop at KOS, so take advantage of coupons released on those days to save.