Lightest 360 Cameras on the Market?

This summer I am planning a multi-day ride and want to mount a 360 camera on my helmet to capture the journey (about 300km total).

I’ve used a GoPro MAX on a helmet mount before as Trek View recommend:

However, after about 3/4 hours, this gives some quite bad neck ache with the added weight.

Hence my question, what is the lightest 360 camera currently on the market?

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