Take a look at Alf's review of the Rollins helmet, with Zipmold technology - good value for money? You decide.
WEBSITE: Bern Rollins
WHAT THEY SAY: "The Rollins utilizes Bern’s tried and true Zipmold+ Technology to create a tapered, thinner, low profile fit that is lighter weight with a higher strength to weight ratio than in-mold helmets. The snow specific Rollins features our patented Stealth Slider venting system that is hidden inside your helmet to allow you to control your vents without the dreaded ice up. The premium knit liner utilizes BOA technology to really dial in on that perfect fit and features drop in audio ready ear flaps which allows you to drop in audio chips at any point so you can ride to your favorite playlist. (audio chips not included)."
WHAT ALF SAYS: The Rollins uses Bern’s ‘Zipmold’ technology to give a thinner, tapered, lighter helmet with a higher strength-to-weight ratio than in-mould systems. It comes with ten vents, with the six upper vents adjustable through Bern’s patented ‘Stealth Slider’. This is an internal adjustable vent sliding system that allows you to open vents as little or as much as you need. Bern say it’s designed to prevent ‘ice up’ that can happen with external adjustment systems, although I can’t say it’s a problem I’ve really had – this may be more of an issue in the eastern USA where the company is based.