Gentleman’s Box Coupon: Save $15 On First Box! Posted by Hello Subscription on July 24, 2019. Subscription Box Coupons & Deals / Gentleman's Box Coupons Hello Subscription may earn compensation via links in this post. Read the full disclosure Save for Later Notification The Gentleman’s Box has a new sale for the Classic Box! Subscribe and get $15 off your first Classic Box when you use the coupon code PROTECTOR15! Are you getting The Gentleman’s Box Classic Box?