Costco Sale: High Sierra Visalia 9 Hydration Pack $19.99 by Rhonda July 18, 2020 5/21/16. This smaller backpack has a padded back panel with airflow channeled air mesh. Costco has the High Sierra Visalia 9 Hydration Pack on sale for $19.99 (after manufacturer’s instant rebate), … 0 FacebookTwitterPinterestEmail