The backpack positions the IceSampler on the left side
of the thoracic vertebrae and is kept in place by two 8-cm wide
elastic straps. A lycra chest cover is used to prevent the backpack
from skating to either side. This goes all way up to the
atlas joint and covers up the sampling line and the catheter
entrance. The backpack is then sealed with a strong zipper
and secured by cable ties. Inside the backpack, the IceSampler
is further protected by a 5–10-cm foam surround