The air gets thinner above 12,000 feet, causing your load to feel heavier and each step to get a little harder. The Trail Grinder 32L Backpack from Columbia Sportswear's impeccable design and featherweight Techlite straps facilitate a fast trip to the summit. The Trail Grinder's straps are comprised of an insanely strong, lightweight compound molded around super-breathing mesh inserts, with a healthy helping of cushioning for comfort. Adding to breathability is the ventilated Backdraft back panel, featuring directional foam conduits that direct hot air out and cooler air in. Omni-Shield® advanced repellency wards of stray sprinkles, and when the real rain starts to fly, an integrated rainfly protects the pack's content. Sternum and hip straps help shoulder the load, while tons of aptly placed pockets store all your stuff securely. Water bottle pockets combine with 3-liter-hydration-unit compatibility to keep you fully hydrated.