some nitros are £100, the race reps anyway. nitro's are brilliant helmets. i have 3 and all are just brilliant. i do a 30 mile commute everyday. and there comfy, warm and quiet.
the red one (n510-v) i got 4 years ago when i got my minimoto,
and i think that was like £60-£70 from hunts honda in manchester and it doesnt even have a proper click in buckle, just a complicated toggle
,
the silver one (n311-v) was £29.99 from ghostbikes
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and the blue one (n200vx) was £35 from race leathers which i wear on my commute