Got an Email for this, just called and verified the deal with a store associate.
For National Helmet Safety Week, Killington is running a promo (through 1/27), with every purchase of a helmet, you get a free lift ticket without blackout dates good for 1/27/20-End of Season.
Helmets are marked up a bit, but it nets out to be a really solid deal. The sales associate i spoke with explained that regardless of the gender and/or size (i.e. Adult/kids), you still recieve a voucher for an adult ticket.
Shipping is ~$10, but you can opt to pick up in store for free which is pretty epic.