Giant Rail Mips MTB Mountain Cycling Helmet

- Designed with a new, rounder head form for a more universal fit
- Fully integrated, super-slim Mips Air Node® liner combines maximum rotational impact protection with ultra-lightweight comfort
- In-molded upper, sub and lower PC shells for optimal protective structure
- Optimized low and high EPS density
- Five-star safety rating from the Virginia Tech Helmet Safety Lab.
- Easy to adjust, dual-arm, four-position, snap-in rear height adjustment fit system
- 21 strategically placed vents for head-cooling airflow
- Supple and lightweight straps with magnetic Fidlock® buckle system
- Three-position adjustable visor
- Broad top surface area for camera or light attachments
- Sizes: S (51-55cm) M (55-59cm) L (59-63cm)
- Weight: 360g (Size M)
Occasionally, without notice, manufacturers change product design and/or specifications.
Giant Helmet Size Guide
How to measure
To find the circumference of your head, place a tape measure in the centre of your forehead, wrap it around above your ears and around the back of your head. If there's a slight difference between two different sizes, always go for the tighter size.

Once you know the circumference of your head, see the available sizes shown on the product and select the appropriate one.
The majority of cycling helmets have some form of adjustment for size, usually in the form of a ratchet adjuster to tighten or loosen the straps, some helmets will also come with different thickness pads to further customise the fit.
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