Head Protection Items, Safety Protection Items Inner Cap For Kids This is like an inner mesh net that you attach to the inside of your hat to protect your head in case of an accident. I used this when I was in kindergarten. The size can be adjusted with Velcro. This is only a simple protective item, so please install it at your own risk. I bought this new from the co-op and used it. I would appreciate it if you could understand that this is a used item. I will take waterproof measures and ship it via Mercari delivery. Inner cap helmet Mesh net Sweat-absorbent and quick-drying Summer items Head protection Inner helmet Helmet inner Honeycomb structure Skiing Snowboarding Snowboard Winter sports Bicycle Preventing falls and injuries Co-op Co-op coop