A high-quality backpack walking the line between travel styles, the Subterra 34L is a unique choice for select travelers. Thule has designed the Subterra 34L with a primary, top loading main compartment. Again, from the techie or hiking perspective, the Subterra 34L is an in between, not leaning too far in either direction. For a straight hiking bag, the Subterra 34L is ideal for a day trip or two, but really isn’t a full fledged hiking pack. Perfect For 30The Thule Subterra 34L works best when it’s only full to about 30 of those liters.