LitCharts assigns a color and icon to each theme in Life of Pi, which you can use to track the themes throughout the work.
Survival
Religion and Faith
Storytelling
Boundaries
Summary
Analysis
Pi’s clothes eventually disintegrate from the sun and salt, and he gets salt-water boils on his skin from being constantly wet. These burst painfully and Pi often cannot find a comfortable position to lie in.
The repetition of the same clothes and the same uncomfortable positions is a negative part of Pi’s routine. In his nakedness another divide is broken down between Pi and Richard Parker.