This pack has a built in safety whistle on the sternum strap that can be used in case of emergency.

Summer Gear:You already know that we have great deals on ski gear, but we now have even better deals on summer shoes, sunglasses, hydration packs, and more.

Got Your Bak Lifetime Guarantee:CamelBak has built its reputation by engineering products that exceed consumer expectations for quality and durability. The Got Your Bak Lifetime Guarantee covers all reservoirs, backpacks, bottles and accessories from manufacturing defects in materials and workmanship for the lifetime of the product.

Quick Link System, 1/4 turn - easy open/close cap, lightweight fillport, dryer arms, center baffling and low-profile design, patented Big Bite Valve, HydroGuard technology, PureFlow tube, easy-to-clean wide-mouth opening.

There are a couple reflective tabs on this pack to make you more visible when riding or walking at nightime. It's always best to stay safe.

The Straps on this pack are made of a thin, breathable mesh to help keep you cool while your mashing up hills on your bike.

There are two external pockets on this pack with ample storage for a multi-tool, handheld pump, spare tube, phone, wallet, keys or a camera.

Slider Sternum Strap:This is the strap that goes across your chest to keep the bag secured to your body when your biking or getting gnarly with your hiking. It slides along the shoulder straps so you can easily find a comfy spot.