G-Form X4 MTB Shirt
Best protective base layer for mountain bikers seeking confident, flexible coverage.
This base layer finally makes wearing body armor feel like wearing a standard jersey. By prioritizing a slim, flexible fit with integrated impact protection, it sacrifices the heavy-duty bulk of traditional pads for a sleek, barely-there feel that actually encourages you to gear up for every ride.
$139.99
at
G-Form
Who it's for
- Aggressive riders needing unrestricted movement and secure protection
- Mountain bikers prioritizing easy maintenance and long-term durability
- Trail riders wanting impact protection without bulky armor
Who should skip it
- Riders in hot, humid climates prone to overheating
- Budget-conscious cyclists seeking affordable protective gear
- Riders looking for casual, standalone apparel options
Performance breakdown
Impact absorption
SmartFlex pads harden instantly upon impact to disperse energy effectively.
Range of motion
Four-way stretch mesh allows for unrestricted movement during aggressive trail riding.
Breathability
Compression fabric promotes airflow to keep you cool on long climbs.
Fit security
Inner hem grippers keep the base layer locked in place securely.
Maintenance ease
Machine washable design makes post-ride cleanup quick and completely effortless.
Ergonomic comfort
Pre-curved pads contour naturally to the body for a distraction-free feel.
Key Specs
Featuring SmartFlex®
Flexible pads that harden upon impact to absorb force and then immediately return to flexible state.
New pre-curved SmartFlex pad provides a flexible, ergonomic, and secure fit at shoulders and ribs to protect from falls and crashes.
Breathable compression fit fabric on the front and back body panels offers 4-waystretch functionality for enhanced mobility.
Slim-fit base layer designed for comfort and performance.
New feature
Inner gripper at the body hem helps keep the garment securely in place.
Multi-panel design for superior fit.
Machine washable.
Still have a question?
Ask Metto anything about the G-Form X4 MTB Shirt before you decide.