Costco Sale: Cascade Mountain Tech Stadium Seat $15.99

*UPDATE* 8/30/17. With patented technology, it folds for easy storage or transportation. Costco has the Cascade Mountain Tech Stadium Seat on sale for $15.99 (after manufacturer’s instant rebate), now through September 8, 2017. That is $4 off Costco’s regular price of $19.99. While supplies last. Features: • Strong steel base frame • Comfortable, lightweight aluminum and canvas back • Under-mounted stabilizer bar keeps seat secure • 17″ Wide seat…