 Fitting Backpacks
4 Positioning the Sternum Strap
 The correct position of the Sternum Strap when wearing a backpack is in the
middle of the sternum or breastbone as illustrated in this diagram. If the Sternum
Strap is lower than this position on the sternum or breastbone, it may interfere
with effective breathing. White Mountain uses an elasticised Sternum Strap to
promote effective breathing and a snug fit without putting excessive pressure
on the chest. It is important that you do not over tension the Sternum Strap
to the point of full extension of the elastic, as this would prevent the Sternum
Strap from operating effectively.
The Sternum Strap in conjunction with the Shoulder Straps distributes some
of the backpack weight across the chest, and prevents the Shoulder Straps from
drifting onto the shoulder joint, or slipping off the shoulder. White Mountain
recommend always using a correctly positioned Sternum Strap if available, particularly
on any extended walks. The Sternum Strap pulls the Shoulder Straps closer to
the centre of the body, allows increased arm flexibility, prevents the Shoulder
Straps drifting onto the shoulder joint, or from slipping off the shoulder.
When climbing, bending over, or scrambling over rough terrain the Sternum Strap
will generally ensure greater backpack comfort under load. The Sternum Strap
although necessary for Shoulder Strap comfort, should not be necessary to achieve
close contact or correct positioning of the Shoulder Straps.
More about Sternum Straps
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