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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.

Features

• AeroSpan suspension with EVAP moisture wicking shallow-depth ventilated back panel 
• Ventilated, dual-density FocusForm shoulder harness and extra supportive hip belts with targeted comfort zones
• Leaf-Spring Lumbar pad for comfortable, energy-saving load transfer
• Ultra-light 7001 aluminum perimeter frame with Anti-barreling support
• Included custom fitted rain cover stows in the top pocket for quick access in unexpected showers
• Removable top zippered pocket to shed ounces and swap-in included ultra-light weather flap to stay protected (stows in top pocket)
• Sunglass QuickStow system on shoulder harness for quick, secure and scratch-free access to your shades without taking the pack off
• Quick access on-the-go water bottle stow access on both the right and Left sides
• Oversized, durable front stretch mesh pocket for quick access organization
• Dual zippered hip belt pockets provide secure, easy to access storage
• Dual stretch mesh side pockets with Large capacity for bottles, camp sandals, trekking poles
• Dual adjustable attachment loops and upper shock locks for trekking poles or ice axes
• Ultra-light V-Compression system on side and bottom of bags
• Lower side compression pass-through on side pocket for over/under option
• Gear attachment points on top pocket and main body

Specifications

• Gear Capacity (L): SM: 55, MD: 58, LG: 61
• Gear Capacity (cu. in.): SM: 3356, MD: 3539, LG: 3722
• Product Dimension: SM: 26 x 12.5 x 11, MD: 28 x 12.5 x 12, LG: 30 x 12.5 x 12.5
• Weight (lbs): SM: 2.40, MD: 2.52, LG: 2.70
• Rain Cover Weight (lbs): SM: .20, MD: .21, LG: .21
• Stripped Weight (lbs): SM: 2.29, MD: 2.42, LG: 2.57
• Material(s): 100% Nylon
• Sleeping Bag Compartmen:t No
• Internal Frame: Yes
• Frame Materials: Aluminum
• Frame Style: Perimeter wire
• Max carry weight (lbs): 35
• Suspension Technology: Aerospan
• Hydration Compatible: Yes
• Hydration Resevoir Included: No
• Number of External Pockets: 3
• Compartment Access: Top Closure
• Type: Drawcord
• Removable Daypack: No