Dakine Builder Hydration Pack - 25L Redline. The ultimate Dakine Builder Pack is designed specifically for mountain bike trail builders. This 40-liter pack carries everything you need from hydration snacks gloves and first aid to the trusty old 5-gallon bucket with external straps for a quiver of longer tools even that trusty chainsaw has dedicated stowage. The Builder Pack is Dakines ode to the art of trail building reworked from the original design released over a decade ago. The Builder Pack is designed right here on the Hood River trail system.