Thousands of homes were destroyed as the cyclone swept across southern Bangladesh last month.
More than 3,000 people were killed by the cyclone, which caused massive flooding and brought the large trees that border many villages crashing to the ground.
Many people were forced to erect makeshift shelters out of bamboo sticks and clothing, which provided little protection from the elements.
Mark and other Shelterbox volunteers were among the first to get aid to the affected region.
The 60kg boxes had to be carried across treacherous terrain to reach the most remote areas.
Each box contains a tent and enough equipment to allow a family to survive for at least six months. All photos: Mark Pearson/Shelterbox