Platypus sprinter xt 35 hike hydration pack molten lava description from long day hikes to ultralight backpacks the sprinter 35 xt hits the sweet spot in size and features to cover it all the top loading design lets you stuff it full to make the most of every liter and weve added an aluminum mono stay down the frame sheet for better weight transfer and control with heavier loads features 30l big zip tm sl reservoir weatherproof construction taped seams waterproof coate