Longer distances and winter temperatures require extra room, and the Optic 58 gives you that additional capacity without compromising your ultralight priorities. Proper load management, moisture-wicking ventilation, and intelligent features keep you comfortable and mentally balanced from sea level to the High Sierra, because efficient trail travel involves more than a weight claim.<br><br><br>AEROSPAN SUSPENSION: AeroSpan suspension with EVAP moisture wicking shallow-depth ventilated back panel.<br><br>FOCUSFORM COMPONENTS: Ventilated, dual-density FocusForm shoulder harness and extra supportive hip belts with targeted comfort zones.<br><br>LEAF-SPRING LUMBAR PAD: Leaf-Spring Lumbar pad for comfortable, energy-saving load transfer.<br><br>INTERNAL ALUMINUM FRAME: Ultra-light 7001 aluminum perimeter frame with anti-barreling support.<br><br>CUSTOM FITTED RAINCOVER: Included rain cover stows in the top pocket for quick access in unexpected showers.<br><br>REMOVABLE LID: Removable top zippered pocket to shed ounces and swap-in included ultra-light weather flap to stay protected (stows in top pocket).<br><br>SUNGLASS QUICKSTOW SYSTEM: Sunglass storage system on shoulder harness for quick, secure and scratch-free access to your shades without taking the pack off.<br><br>QUICK ACCESS WATER BOTTLE POCKET: On-the-go water bottle stow access on both the right and left sides.<br><br>FRONT STRETCH MESH POCKET: Oversized, durable front stretch mesh pocket for quick access organization.<br><br>ZIPPER HIP BELT POCKETS: Dual zippered hip belt pockets provide secure, easy to access storage.<br><br>STRETCH MESH SIDE POCKETS: Dual stretch mesh side pockets with Large capacity for bottles, camp sandals, trekking poles.<br><br>ADJUSTABLE ATTACHMENT LOOPS: Dual adjustable attachment loops and upper shock locks for trekking poles or ice axes.<br><br>ULTRALIGHT COMPRESSION STRAPS: V-Compression system on side and bottom of bags.<br><br>PASS-THROUGH POCKET: Lower side compression pass-through on side pocket for over/under option.<br><br>GEAR LOOPS: Gear attachment points on top pocket and main body.