MET Sine Thesis Ice Lite review

Ice Lite Baby

BikeRadar score4/5

Most high performance helmets focus on cooling, fit and function, with only token consideration for visibility. MET thinks differently, and the Italian company has reworked its Sine Thesis helmet to help you be seen when the sun goes down.

Central to its performance is MET’s Ice Lite Exoskeleton, which is a rigid polycarbonate structure around which the expanded polystyrene (EPS) core is moulded.

Such is the strength of the exoskeleton that the Sine Thesis has what MET claims are some of the largest vents of any road helmet. The two V-shaped upper central vents run from front to back and half way along each side, with only five clear Ice Lite bridges crossing the EPS chasms to maintain integrity, and they’re angled to direct passing air through the vents. The external shell extends to cover the base, making this one tough lid, and our large example weighed 325g.

A rechargeable six-LED rear light that clips over the adjustment dial is supplied

In all there are 14 vents, many subdivided by the polycarbonate bridges, but as we know, the number of vents alone has little bearing on cooling ability. Recognising that heat will be created where a helmet contacts the skull, the Sine Thesis features MET’s Gel 02 pads, made from hypoallergenic polyurethane morpho-gel that conform to the head.

There are just eight short pads, plus a full width brow pad that prevents sweat from running into your eyes, and as they aren’t absorbent, the pads remain hygienic. With only 20 percent of the helmet in contact with the skull, plus vast internal channels, airflow is impressive, making this MET extremely airy even at slow speeds.

The Safe-T Smart retention system is easy to adjust, providing a great fit that feels secure with no pressure points. A rechargeable six-LED rear light that clips over the adjustment dial is supplied, and at only 13g can be left attached for emergencies.

Visibility is further enhanced by reflective stripes on the tough Kevlar straps, large reflective stickers around the shell, and the Ice Lite polycarbonate’s party trick. The clear bridges are injected with luminescent material, which glows green for one to two hours in the dark, and although not especially bright, does add visibility.

The Sine Thesis comes in white, black or fluoro yellow shell colours.

This article was originally published in Cycling Plus magazine, available on Apple Newsstand and Zinio.

Robin Wilmott

Tech Writer, Tech Hub, UK,
Robin began road cycling in 1988, and with mountain bikes in their infancy, mixed experimental off-road adventures with club time trials and road races. Cyclocross soon became a winter staple, and has remained his favourite form of competition. Robin has always loved the technical aspect of building and maintaining bikes, and several years working in a good bike shop only amplified that. Ten years as a Forensic Photographer followed, honing his eye for detail in pictures and words. He has shot at the biggest pro events since the '90s, and now he's here, drawing on all those experiences to figure out what makes a bike or component tick.
  • Age: 45
  • Height: 178cm / 5'10"
  • Weight: 75kg / 165lb
  • Discipline: Road, cyclocross, time trials
  • Beer of Choice: Sierra Nevada Pale Ale

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