Troy Lee Designs - D4 Polyacrylite Block Helmet (MTB)
SKU: 20028840145

Troy Lee Designs - D4 Polyacrylite Block Helmet (MTB)

Sale price$95.04 Regular price$105.60
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Ships within 48 hours · Estimated delivery Jul 6 - Jul 11

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For Your Every Summer RSVP, with Code: SUMMER15

Description

Troy Lee Designs - D4 Polyacrylite Block Helmet (MTB)Troy Lee Designs D4 Polyacrylite Block Helmet (MTB) D4 Polyacrylite Block Helmet is a Troy Lee Designs mountain bike helmet built for enduro and bike park riders. The D4 platform is known for downhill focused coverage and a locked in feel when the terrain gets steep and fast. The Polyacrylite shell helps keep the price more approachable while still delivering the coverage riders expect. In the Block colorway, it brings a strong visual identity without

Troy Lee Designs - D4 Polyacrylite Block Helmet (MTB)

D4 Polyacrylite Block Helmet is a Troy Lee Designs mountain bike helmet built for enduro and bike-park riders. The D4 platform is known for downhill-focused coverage and a locked-in feel when the terrain gets steep and fast. The Polyacrylite shell helps keep the price more approachable while still delivering the coverage riders expect. In the Block colorway, it brings a strong visual identity without losing the performance-first focus of the helmet.

The fit is aimed at riders who need their MTB helmet to stay composed on technical descents while still feeling comfortable during transitions, climbs, and longer days outside.

Why We Like It: it gives riders a stable feel on rough descents without turning every climb into a chore.

Why It’ll Work for You: For riders comparing mountain bike helmets, this one makes sense for technical trails, gravity runs, and all-day pedal missions where comfort still matters.

Variants / Options: multiple sizes and colorways available; check the selector for current stock.

Key Features:
  • as the premium carbon and composite models into a price-conscious shell. Details make the D4 the most coveted full-face in mountain biking, including Mips® C2 brain protection, an air intake system for ventilation, and an unmatched anatomical fit.
  • This helmet is designed and intended exclusively for use by bicycling activities, including mountain biking and off-road cycling.
  • Specifications
  • Mips® C2 Rotational Impact Brain Protection System
  • Advanced Polyacrylite shell construction
  • Front air intake system, with high flow through polymer center and power grid side mesh
  • Collarbone Suspension System
  • Breakaway visor screws
  • Anti-microbial padding
  • Quick release contoured 3D cheek pads for anatomically optimized fit

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 20028840145

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Peter Dooley
Lowell, US
★★★★★ 3
Good Fit but too long
Size: Medium, Color: Army Green
I would give these shirts a 5 star rating if they weren’t so long over the waist, even a medium sized it doesn’t matter way too long
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Reviewed in the United States on May 5, 2026
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SkipDesign
Boise, US
★★★★★ 5
A T-shirt chic? YES!!
Size: X-Large, Color: Wine Red
This is the second one of these shirts I’ve ordered. I don’t wear ties anymore, so I actually wear this mock turtle neck under a blazer, or a sports coat as my father used to call them. I wore a blue one the other evening and I wore it underneath a plaid blazer. Whoever would guess a T-shirt could be quite so chic. It stretches plenty, it’s light and it’s so comfortable. I have two of them now and I’m deciding on a third one.
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Reviewed in the United States on April 29, 2026
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Holliday
San Leandro, US
★★★★★ 5
Light and Warm
Size: XX-Large, Color: Royal Blue
Quite comfortable (with a little tape over the label on the inside left) perfect light weight shirt for 40°-50°.
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Reviewed in the United States on April 13, 2026
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Daniel agudelo
Whiting, US
★★★★★ 5
Buenas
Size: Large, Color: Dark Grey
Muy buenas para el sol
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Reviewed in the United States on March 29, 2026
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Dave O’Shea
Los Angeles, US
★★★★★ 5
Soft and cozy fot
Fits well and is nice and cozy material look is as was needed for cos play uniform and fit was perfect the material is soft and is light weight for summer use for things without over heating and I am a big guy who over heats on a regular basis
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Reviewed in the United States on July 15, 2025

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