G-Form Pro-X3 Youth vs Leatt 3DF 5.0 Jr Knee Pad
Two of the most popular youth MTB knee pads - the soft, sleeve-style G-Form Pro-X3 versus the hard-cup Leatt 3DF 5.0 Jr. Both are CE Level 1, so construction, fit feel, and how aggressively your kid rides decide which one to buy.

- Certification: CE EN1621-1 Level 1
- Foam: RPT (Reactive Protective Technology)
- Construction: soft compression sleeve with reactive pads
- Breathability: excellent moisture-wicking
- Shell fabric: 82% nylon, 18% spandex

- Certification: CE EN1621-1 Level 1
- Foam: 3DF impact foam
- Construction: hard-shell cup + 3D sleeve
- Breathability: moisture-wicking mesh
- Materials: silicone + foam
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Side-by-side spec sheet
| Aspect | G-Form Youth Pro Knee Pad | Leatt 3DF 5.0 Jr Knee Guard | Winner |
|---|---|---|---|
| CE rating | EN1621-1 Level 1 | EN1621-1 Level 1 | Tie |
| Construction | Soft sleeve, reactive pads | Hard-shell cup + 3D sleeve | Knee Guard |
| Pedalling comfort | Disappears on the bike | Noticeable on long climbs | Knee Pad |
| Breathability | Excellent | Good | Knee Pad |
| Slide-out abrasion resistance | Limited (sleeve fabric) | High (hard cup) | Knee Guard |
| Best use | Flow trails, pump track, XC | Enduro, jumps, rock gardens | Tie |
| Amazon price | $69.99 | $80.01 | Knee Pad |
The verdict
Pick the G-Form Pro-X3 Youth for kids on flow trails, pump tracks, and bike-park lift days where comfort matters most - the soft RPT pads stiffen on impact but disappear while pedalling, and they are the cheaper of the two. Pick the Leatt 3DF 5.0 Jr if your kid is hitting drops and rock gardens: both pads carry the same CE Level 1 rating, but the Leatt adds a hard outer cup that survives slide-out crashes far better than a fabric sleeve.
G-Form Pro-X3 Youth - same CE Level 1 rating as the Leatt for about $10 less, and kids actually keep it on.
Leatt 3DF 5.0 Jr - the hard outer cup spreads impact and resists abrasion better than the G-Form sleeve in slide-out crashes.
Not sure which knee & elbow pads fits you?
Our sizing guides and category pages help you narrow the field.