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The Fulmer D4 “Evil Spell”
Fulmer D4 Helmet Review
The Fulmer D4 “Evil Spell” The Fulmer D4 has a few unique features that help separate it from other inexpensive helmets. Fulmer’s Air Channel Technology ventilation system really does seem to work. It also gives the D4 an interesting and smooth shape that also helps control noise. Strong detents in the visor and an impressive …