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 = ""; } } }); Unique contour shape that tapers at both the top and the bottom, giving the pack an excellent close-to-the-body ride Simple, robust, lightweight, and comfortable backpack Fully compressible with pairs of side-mounted compression straps to optimally position the pack's contents over the wearer's center-of-gravity PALS/MOLLE compatible webbing Interior and exterior panels for attaching an array of accessory pouches Description Product Description The X4 is the 3-day pack of the future: simple, robust, highly organized, lightweight, and comfortable.The X4 is a variation of our popular X1A1 model, without a scabbard (see the very similarly designed X3 pack if you prefer an incorporated Backscabbard). The X4 has a unique contour shape that tapers at both the top and the bottom, giving the pack an excellent close-to-the-body ride. It is fully compressible with pairs of side-mounted compression straps that draw the load upward to optimally position the pack's contents over the wearer's center-of-gravity.Well endowed with PALS/MOLLE compatible webbing, the pack is easy to accessorize, with ample space on the interior and exterior panels for attaching an array of accessory pouches.