Gainz Box April 2018 Spoilers #2 ! Posted by Hello Subscription on April 14, 2018. Subscription Box Spoilers / Gainz Box Spoilers . The links in this post may be affiliate links. Read full disclosure Save for Later Notification Gain[z] Box released the first exclusive look at the April 2018 Gainz box! The theme is Part of the Crew! Each box includes: A Crewneck Sweater! Check out the sneak peek here: Are you getting Gain[z] box this month?