Features Enter your model number above to make sure this fits. P.when("RPPStripeRendered").execute(function(stripeData){ if(stripeData && stripeData.state){ switch(stripeData.state){ case "result-found": document.getElementById("replacementPartsFitmentBulletInner").innerHTML = "This fits your "+stripeData.item+"."; document.getElementById("replacementPartsFitmentBullet").className = ""; break; case "no-result": if(stripeData.showBullet && stripeData.showBullet !== "0"){ document.getElementById("replacementPartsFitmentBulletInner").innerHTML = "No information found for this part for "+stripeData.item+"."; document.getElementById("replacementPartsFitmentBullet").className = ""; } break; default: document.getElementById("replacementPartsFitmentBullet").className = ""; } } }); Backbender flexible cooling panel for superior ventilation and comfort. Air jet textured for high abrasion resistance and exceptional strength to weight ratio. Comfort backpack straps with hydration or headphone routing, a reflective hit and detachable sternum strap. Internal welded laptop pocket for laptops up to 15" inches. Guaranteed waterproofing. Secondary buckle attachment point allowing you to over stuff this bag and carry everything including the kitchen sink. Description Product Description FEATURES of the Timbuk2 Especial Cuatro Backbender flexible cooling panel Comfort backpack straps Secondary buckle attachment point allowing you to over stuff this bag and seriously expand your load Swing around back access document pocket- get in and out without having to take the bag off your back Highly water resistant design including a zipper cover U-Lock holster which can double as a water bottle pocket Made to customize to your load- compress for small objects and expand for large boxes and/or the kitchen sink Air jet textured Cordura ripstop nylon 6.6 for high abrasion resistance and exceptional strength to weight ratio