GPA Liner Easy & 4S – Replaceable inner lining for a perfect fit & fresh comfort Give your GPA Easy or 4S helmet a second life or adjust it to your size with the original GPA Liner. This removable and washable inner lining is designed for a perfect fit, optimal support, and hygienic use – ideal as a replacement for a worn liner or for adjusting the size. Why choose the GPA Liner: Provides a precise fit – ideal for size changes or varying users Easily removable & washable – keeps your helmet fresh and comfortable Supports the head firmly without pressure points Specially designed for GPA Easy & 4S helmets – not suitable for older models Available sizes & scale distribution: Shell S: suitable for sizes 53 to 56 Shell M: suitable for sizes 57 to 59++ 59 = standard 59+ = equivalent to size 60 59++ = equivalent to size 61 Color: Black Tip: ideal to have as an extra liner on warm days or for intensive use. GPA Liner Easy & 4S – for a helmet that fits like new.