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Troy Lee Designs D3 Composite MIPS Helmet

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Item # TLD00PH

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Item # TLD00PH

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The Troy Lee Designs' D3 Composite MIPS Helmet mirrors the top-shelf D3 Carbon, but as the name suggests, features a shell made from composite instead of superlight carbon. It features the same highly adjustable incremental sizing system found its more expensive sibling, which all but guarantees a comfortable fit for any head shape. The D3 Composite MIPS also incorporates Multi-directional Impact Protection System (MIPS), which diffuses the rotational energy generated by certain crashes.

The outline of the D3 is the same as the old D2, but TLD played with the shape just a bit to improve its fit and feel. There's more EPS foam in the frontal areas, and the new 3D cheek pads are contoured to fit around your jaw and face for a more secure fit. Troy Lee also redesigned the visor and front trim, giving them smoother edges for a better look.

The D3's shell is made from a carbon composite material that's incredibly strong and surprisingly light. This shell is lined with dual-density shock pads that help absorb smaller impacts. Its removable, washable liner incorporates Coolmax and Dri-Lex technologies, which wick moisture, cool your dome, and fight odor.

A host of 20 vents pulls air across your head and forces it out the back for efficient cooling, the adjustable visor is held in place with titanium hardwear (and can be swapped out for the included second option), and the corrosion-resistant D-ring fastener cinches the D3 around your chin to keep it from bouncing off when things get a little rowdier than planned.

  • DH-ready helmet for big sends
  • Light, strong shell and EPS absorb direct impacts
  • MIPS diffuses rotational energies in certain crashes
  • 20 vents keep you cool on warm days
  • Adjustable sizing system provides a customizable fit

Tech Specs

Shell Material:
Impact Foam:
20 vents
Fit Adjustment:
incremental sizing
yes, adjustable, extra visor included
Full Face:
CPSC 1203, CE EN 1078, ASTM F1952-15, ASTM F2032-15, ASTM F2040-11
Recommended Use:
mountain bike, downhill
Manufacturer Warranty:
1 year

Size chart

Troy Lee Designs

Bike Helmets
Head Circumference 21.3 - 22in
(54 - 56cm)
22.4 - 23.2in
(57 - 59cm)
22.6 - 24.8in
(60 - 62cm)
Hat Size 6 3/4 - 7 7 1/8 - 7 3/8 7 1/2 - 7 7/8
Head Circumference 20.5 - 20.9in
(52 - 53cm)
21.3 - 21.7in
(54 - 55cm)
22 - 22.4in
(56 - 57cm)
22.8 - 23.2in
(58 - 59cm)
23.6 - 24.4in
(60 - 62cm)
24.8 - 25.6in
(63 - 65cm)
US Hat Size 6 1/2 - 6 5/8 6 3/4 - 6 7/8 7 - 7 1/8 7 1/4 - 7 3/8 7 1/2 - 7 3/4 7 7/8 - 8 1/8
Head Circumference 21 - 22in
(53 - 55cm)
22.4 - 23.3in
(56 - 59cm)
23.7 - 24.5in
(60 - 62cm)
US Hat Size 6 1/2 - 6 7/8 7 - 7 3/8 7 1/2 - 7 3/4
How to Measure:
With a tape measure, measure the widest point of your head, approximately 1 inch above your eyebrows.

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Awesome Helmet - Runs small

  • Familiarity: I returned this product before using it
  • Fit: Runs small
  • Size Bought: Small

This helmet was for my wife. I have a D3 myself and I've put it through the wringer. Awesome. Plenty of light crashes on it where it saved my noggin. Very cool to wear when you're moving. So it has a great air flow design. Very comfortable when you have the right size. I had to step up to a XL from a L. My wife had a S that we're returning for a M.