Great product and customer service!
My version 3 endurance pack is by far the best hydration pack I've ever owned! It barely feels like you are wearing it! I also opted for the extra gear bag to stash a light windbreaker and I love that this vest doesn't bounce not only that but the straps across the chest aren't elastic like most vests or packs which eventually lose their elasticity. Overall I would highly highly highly recommend this vest and I would definitely buy it again and other products of Orange Mud.