Browse Mount Si Wildcats apparel and spirit wear for students, parents, fans, and supporters. Explore high-quality t-shirts, hoodies, sweatshirts, and game-day gear made to celebrate Mount Si High School pride all year long.
If you're a principal, advisor, coach, PTO/PTA member, booster, or another representative or leader within Mount Si, we'd love to work with you. Through our Store Partnership Program, you can help guide updates to your organization's store — including colors, logos, collections, and products — to better reflect your community.
Store Partners also earn back a portion of every sale made through their store, turning spirit wear into a simple, ongoing source of support for your organization.
Show your Wildcats pride and support the Red and Black with custom Mount Si High School apparel
designed for everyday wear and all events. Whether you're cheering on teams like football, basketball,
soccer, and cross country, or supporting clubs and programs such as drama, debate, and band, we have you covered
with spirit wear that is high-quality and comfortable.
