If Willie Nelson rode mountain bikes, he would most certainly wear this headband and likely without a helmet. But "Momma Don't Let Your Babies Grow Up Without Wearing A Helmet", and if you're looking to keep sweat out of your eyes, wear this little ditty underneath. We partnered with local brand Junk on this "Big Bang" style headband, made with 89% polyester and 11% Lycra. It's washable, stretchy, wicking, and breathable (which is more than we can say about you when you’re climbing Powerline on the Back 40)