Project.23 Helmet Liners for ABS helmets offer a simple and effective way to adjust the fit of your helmet or replace worn padding. Depending on the size and thickness, the fit around the top of the head can be adjusted to be tighter or looser without changing the helmet shell. Thicker liners provide more support, while thinner versions offer additional room. This makes the inner padding suitable for both fine-tuning the fit and restoring the original feel. The clear gradation of padding thicknesses for each size makes selection easy and allows for precise adjustment to head shape and personal comfort requirements.