Do I need an enduro helmet if I only ride flow trails?

If your trails are smooth, groomed, and lack technical features like rocks, roots, and steep descents, a standard trail or XC helmet provides adequate protection with less weight and better ventilation. Enduro helmets become necessary when crash risk increases due to technical terrain, higher speeds, or larger features. If you're unsure, err on the side of more coverage—you can always remove the visor and open the vents on an enduro helmet, but you can't add coverage to a trail helmet.