Unigear Tactical Hydration Pack Backpack 900D with 2.5L Bladder for Hiking, Biking, Running, Walking and Climbing

Amazon.com Price: $35.99 (as of 11/29/2021 17:01 PST- Details)

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Adjustable shoulder/chest straps. Fit chest sizes from teenagers/kids with 27″ up to adults (men and women) with 50″ chest size. The chest straps make sure it doesn’t bounce when you move; Whistle buckle for emergency.
Rugged 900 Denier Polyester heavy-duty construction with PVC lining, resistant to tears and abrasion; Hands-free hydration hose with bite valve, gently biting the valve opens up the flow of water