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Last Updated: September 28, 2026
Birthday bashers can enjoy a special reward at Knix
Knix offers a Birthday Reward for members of the Knix Rewards program. Upon creating an account and registering your birth date, an exclusive birthday points bonus or discount voucher will be added to your account during your birth month to save on seamless underwear, wireless bras, and loungewear.
Register for a free account to join Knix Rewards on the official website.
Complete your account profile by entering your date of birth.
Check your email inbox or loyalty account dashboard during your birth month to view your Birthday Reward.
Redeem your voucher code in the discount box during online checkout.
"Sign up for birthday rewards"
Browsing the Shop All department gives you access to the complete line of Knix leakproof underwear, activewear, shapewear, and sleepwear.
The Category Sales and Offers section highlights current product bundles, multipack savings, and featured collection promotions.
Shopping the Last Call clearance section lets you save on discontinued colors, seasonal activewear, and final-sale loungewear.
Knix eGift Cards provide an easy option for gifting intimate apparel while staying on budget.
Joining Knix Rewards lets you earn points for shopping, sharing, and reviewing products, which can be redeemed for dollar-off discount codes.
Subscribing to the official email newsletter delivers first-look access to product launches, exclusive promos, and sale updates.