CurlKit Labor Day Sale: 50% Off Coupon! EXTENDED!! Posted by Hello Subscription on September 5, 2017. Labor Day Subscription Box Deals / Subscription Box Coupons & Deals / CurlKit Coupons Hello Subscription may earn compensation via links in this post. Read the full disclosure Save for Later Notification CurlKit is having a Labor Day sale! Save 50% on boxes including on longer-term subscriptions (find them under the membership tab)! Use promo code LABOR50. Visit CurlKit to get this offer.