From long day hikes to ultralight backpacks, the Sprinter 35 XT from Platypus 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 we've added an aluminum mono-stay down the frame sheet for better weight transfer and control with heavier loads.

3.0L Big Zip SL reservoir

Weatherproof construction (Taped seams, waterproof-coated fabrics and water resistant zippers)

Zippered top-load access

Ventilated/padded suspension

Multi-use waistbelt

Stashable accessory straps

Removable frame sheet with aluminum stay

Independent hydration pocket

Ice axe/helmet/trekking pole carry

Waistbelt pockets

Mesh side pockets

Mesh stash pocket on back

Multiple hose routing options