When should Soldiers be encouraged to wear a sock liner under the cushion sole sock?

Encouraging Soldiers to wear a sock liner under the cushion sole sock during the first three weeks of training and for ruck marches over 5 kilometers is crucial for preventing blisters and ensuring overall foot health. This period is particularly important as Soldiers are adapting to their new boots and engaging in high-impact activities that can lead to increased friction and moisture buildup in their footwear.

The sock liner acts as an additional layer that helps manage moisture and reduce friction against the skin, which is especially beneficial during extended periods of movement or when traversing longer distances. This setup not only provides comfort but also supports the adjustment phase for new footgear, where the risk of discomfort and injury is heightened.

Choosing this timeframe for the use of sock liners aligns with best practices for physical training and ruck marching, ensuring that Soldiers can perform effectively while minimizing the risk of foot injuries.