All Callisto helmets are individually centimetre sized using the Callisto helmet liner and the corresponding helmet size best suited to your needs :
Our plush, removable, washable, and replaceable liner, ensures superior wicking and cushioning for comfort and easy maintenance.All Callisto liners are available from 53-63cm, come in Black / Navy / Metallic Navy and feature our signature evoke padded nape.We always recommend purchasing two so you can wash one whilst the other is in use.
• Small – liners available from 53-55cm
• Medium – liners available from 56-58cm
• Large – liners available from 59-61cm

Callisto Liners are also available in different thicknesses should you be between sizes


Callisto helmet liners are available in Black, Navy or Metallic Navy to best match your helmet of choice.