Cairn Deal: Get a Bonus Gear Worth Over $85! Posted by Hello Subscription on February 13, 2018. Subscription Box Coupons & Deals / Cairn Coupons Hello Subscription may earn compensation via links in this post. Read the full disclosure Save for Later Notification Cairn is currently offering a bonus gift when you subscribe. Don’t miss out on this limited time Cairn collection of subscriber favorites with the UCO Air Headlamp and a FREE bonus gift. Use Promo Code: BONUSTIME Grab this special Cairn deal here.