This is an inner set for the OGK Kabuto Geosys. Both sizes are L size standard. I purchased a size L Geosys in May 2025, but the size didn't fit, so I changed to a size M inner set, making this unnecessary. It's practically unused, only tried on (for a few minutes). How about it for a spare or for size adjustment? The Geosys helmet shell is the same for M and L, so size changes are possible. [The packaging will be kept as simple as possible, please understand.] [Please refrain from asking for a price reduction, as any price adjustments will be made at my discretion.]