Sale Off
YAK BOULDER HAT - HYPOXIC - detail photo of a 5 panel hat with quick dry performance materials
$ 45.00
Yak Boulder Hat - Hypoxic
Yak Boulder Hat - Hypoxic
  • Sizing Chart

Ships within 1 - 2 Business Days


The Boulder Hat is a lightly structured 5-panel hat with a flat brim panel front and belt loop adjustment for a customizable fit. It utilizes high performance, ultra light, and breathable materials for maximum utility and style points.


  • Universal fit
  • Flat bill


You may also like:

Layers well with:

Subscribe and get 10% off your first order!

Subscribe to our newsletter and be the first to hear about new products, sales, and more!

We respect your privacy and your data is never sold. By signing up you agree to our Terms of Use and Privacy Policy. 

  • Sizing Chart 
  • Mens 
  • Womens 

Measurement Guide

1. SLEEVE: With the elbow slightly bent, measure from the center of the neck (vertebrae), Over the shoulder, along the outside of the arm, and down to the wrist bone

2. CHEST: Measure beneath the arms at the fullest circumference of the chest

3. WAIST: Measure around the narrowest part of the waist. 

4. HIP: Measure around the widest part of the hip. 

5. INSEAM: Measure the inside of your leg from the highest point down to the ankle or desired pant length.


Find a soft tape measure and a helper.

If your sizes line up in two distinct different size categories for chest, waist, or sleeve, choose the larger size.

If your sizing is between two categories, size down for a slim fit and size up for a looser fit.