What Our Gearhead® Experts Are Saying:"I've put the Cayo 25L Backpack through a lot, from rainy morning paddles to long days bouncing between the water and the office. The DryHide Shell and RF-welded seams genuinely keep everything inside dry when conditions turn, and the ComfortComb Mesh Back Panel makes a loaded pack feel manageable even when I'm moving fast. The HitchPoint Grid is a nice touch, too, since I can clip on accessories without sacrificing any room inside."The day rarely goes in a straight line, and the YETI Cayo 25L Backpack is built with that in mind. Toss it in the car before a morning surf, haul it through a rainy commute, or sling it over a shoulder at the trailhead. Whatever the plan looks like, the Cayo is the kind of bag that doesn't ask you to choose between function and durability. YETI built the Cayo around a DryHide Shell with RF-welded seams and a PU-coated zipper, so belongings stay protected when the weather turns without warning. The ComfortComb Mesh Back Panel keeps air moving against your back during longer carries, while the adjustable chest and waist straps balance the load no matter how it's packed. Quick-access exterior pockets put hydration and small essentials within reach on the move, the interior stretch-woven organization keeps gear from shifting around, and the HitchPoint Grid lets you snap on SideKick Dry Gear Cases or a Rambler Bottle Sling when you need to expand on the fly. An interior sleeve holds a two-liter reservoir in place when the trail calls for hands-free hydration.