 Fitting Backpacks
Harness Systems
EYS Harness - Express Yoke System
 The Express Yoke System has an adjustable sliding yoke connecting both shoulder straps, for ease and speed of adjustment. The central sliding yoke is
padded, covered in a breathable mesh, includes an airflow channel for increased ventilation and is positioned when the backpack is worn for the first time. The Internal Staves are not parallel as in the SYS Harness System, but tapered to the base of the backpack ensuring
maximum load transference to muscles on the lower back either side of the Sacrum or the base of the spine. This tapered design also provides for narrower shoulders when adjusted to the smaller Torso Length. This harness is currently available on the White Mountain Euro Travel
and Alpine series of backpacks.
Features
Haul Loop, Dual Tapered Internal Aluminium Staves, Sliding Shoulder Harness Yoke, Dual Density Foam Padded Shoulder Straps and Hip Belt, an Airflow channel on the Sliding Yoke, Breathable Mesh on a Padded Yoke, Padded Hip Belt and Padded Lumbar Cushion, a Sliding Sternum
Strap, Shoulder Strap D-Rings, Upper and Lower Stabilizer Straps, Dual Adjustable Waist Buckle and Keepers on the Hip Belt.
Torso Length
The EYS Harness System allows for an effective adjustment range of 10 cm either side of the optimum or medium Torso Length, or a recommended adjustment of 5 cm below and 10 cm above the optimum or medium Torso Length.
Special Feature
Adjust the Sliding Yoke and Torso Length while the backpack is on the individual wearing the backpack.
How do you fit the EYS Sliding Yoke Harness System?
Remove, contour, and install the two Internal Staves. These two Internal Staves are easily located at the top of the backpack, behind two press-stud tabs.
Loosen the two Sliding Yoke Adjustment Straps attached to a ladder buckle on the backpack, below and either side of the Sliding Yoke.
Pull the Sliding Yoke to the upper most position on the backpack.
Pull on the Upper Load Stabilizer Straps located at the top of the Internal Staves to form a gentle arc in the Shoulder Straps and feed the excess of webbing through the Shoulder Strap D-Rings.
NOTE: Pulling the Upper Load Stabilizer Straps to this point enables the individual to put the backpack on without it pulling away from the back.
Put the backpack on the individual and have them pull the two Shoulder Straps simultaneously down and towards the backpack. This will gently draw the backpack into position with the Internal Staves following the contour of
the individual’s back.
he exit point of the Upper Load Stabilizer Straps should come to rest below the Clavicle in front of the shoulder.
Proceed to position the Hip Belt by pulling down and then up on one of the two Sliding Yoke Adjustment Straps while the individual is wearing the backpack. This will then force the Sliding Yoke down the frame and bring the
top of the Hip Belt up into the correct position level or just below the top of the hipbone or Iliac Crest.
NOTE: To avoid any discomfort to the individual we would suggest placing one hand on the shoulder while performing this adjustment, this will also prevent the Upper Load Stabilizer Straps moving out of place.
If you are right-handed yourself perform this operation on the left side of the individual, or if you are left-handed perform this procedure on the right side of the individual.
The backpack fitting is complete when you have backpack position correctly with the Internal Staves following the contour of the back, the pull position of the Upper Load Stabilizer Straps below the Clavicle and the Hip Belt
in the correct position level or just below the top of the hipbone or Iliac Crest.
White Mountain™ do provide sliding buckles on the Shoulder Straps for a finite adjustment in the placement of the Upper Load Stabilizer Strap pull position, but it is our opinion that these in the majority need not be used and can stay positioned hard against the
Shoulder Strap D-Ring. These sliding buckles can, however, be moved up to 25 mm in either direction to optimise the position of pull from the shoulder.
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