DISCOUNT EXPED Vertigo 30 Climbing Mountaineering
Designed specifically for technical mountaineering trips requiring extra gear and the associated weight. Dual alloy stays, a generously padded hipbelt and back panel support heavy loads on the approach. A floating lid with inner and outer pockets and a set of side compression straps (can also be used for front compression) extend the carrying capacity. The flat double layered base offers durability and stands upright when set on the ground.
23.6 × 11.8 × 9.4 in
17.7 - 20.1 in
29.5 - 53.9 in
Water repellent treated
840 D Oxford nylon, PU coated, 1'500 mm water column
6061-T6 series aluminum
Depending on pack volume and intended use the suspension system of a backpack becomes an essential feature. Defining torso length is not necessarily critical on a daypack but crucial on backpacking or alpine touring packs, as only perfect fit can warrant transfer of a bulk of the pack weight to the hips.
The center of the hipbelt ideally rests on the hip bone crest (pelvis) in order to bear the bulk of the load (refer to diagram) especially on large internal frame backpacks. But no rule without exceptions and sometimes a shorter torso length is better, for example in alpine or mountaineering situations where a short back allows easy access to the climbing harness.
HOW IS TORSO LENGTH DEFINED?
Use a measuring tape to measure the distance between the top edge of the shoulders or C7 vertebrae (the one that protrudes when facing down) to the top crest of the hip bone (pelvis).
A rough guide to pack sizing and torso lengths:
medium (M) = 48 - 52 cm / 19 - 20.5 inch
long (L) = 53 - 58 cm / 21 - 23 inch