Here's what other sites are saying:
High Sierra Camp & Hike Hydrahike 4L Hydration Pack Mercury/Redline 18inx 10.8inx 2in 1054904637. This is the perfect hiking hydration bag for any occasion. Whether hiking through the mountains going to a concert or just taking a walk around town. Features/Specifications: Large main compartment with hydration reservoirOrganizer compartment with divider pockets and key clipReflective details on the front and back of the bag for safetyAdjustable sternum strap and hip belt webbingLight blinker loop. Air mesh back panel and shoulder straps
CLOSEOUTS . Just take the essentials for a quick turn on the trails with this streamlined High Sierra Hydrahike hydration backpack. Available Colors: MERCURY/RED LINE, LAGOON/SLATE/ZEST, BLACK/SLATE/POOL, REDLINE/CRIMSON/TURQUOISE.