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Trekka Kosci Tee

Regular price$18.99
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Color
Size
Fit Note: Our sweatshirts run a size small. For the best fit, we recommend ordering one size up from your usual.
  • In stock, ready to ship
  • Backordered, shipping soon
Inspired by Mount Kosciuszko, Australia’s highest peak, the Kosci Tee is built for those who push boundaries and seek new heights. Made from lightweight, breathable fabric, this tee keeps you cool whether you're summiting a peak or navigating the everyday. Its clean design and durable construction make it the perfect companion for any adventure, from alpine trails to city streets.

• 100% cotton
• Tubular fabric
• Taped neck and shoulders
• Double seam at sleeves and bottom hem

Size guide

  LENGTH (inches) WIDTH (inches) SLEEVE LENGTH (inches)
S 28 18 15 ⅝
M 29 20 17
L 30 22 18 ½
XL 31 24 20
2XL 32 26 21 ½

At Trekka, we aim to get your gear to you as quickly and efficiently as possible. All orders are shipped via regular ground shipping, with rates calculated at checkout based on your location. Once your order is processed, you’ll receive a confirmation email with tracking details so you can follow your package every step of the way.

If you’re not completely satisfied with your purchase, we offer returns within 15 days of delivery. Items must be in their original, unworn condition with tags attached. For more details on returns and exchanges, please visit our Returns Policy page.

Got questions? Our support team is here to help—because adventure should be hassle-free.

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Don't take our word for it

★★★★★

Lightweight, breathable, and perfect for any adventure. Keeps the sun off without getting too hot—easily my go-to hat now!

Jake Thompson

Byron Bay, Australia

★★★★★

Great fit and super breathable. Perfect for long days outside—whether I’m on the trail or just out and about

Ryan Carter

Austin, TX

★★★★★

Super comfortable and built to last. Wore it on a weekend hiking trip, and it held up great. Definitely a new favorite!

Sarah Miller

Denver, CO