The inside lining of NACA helmet is removable, washable at 30C°, without detergent. It must be dried naturally (no dryer).
Its amara fabric is very soft and comfortable. Memory foams do not flatten over time.
Sizes are interchangeable as follows:
- Shell XS: 53cm, 54cm
- Shell S: 55cm, 56cm, 57cm
- Shell M: 58cm, 59cm
- Shell L: 60cm, 61cm