It's highly recommended but not absolutely essential. DWR (durable water repellent) treatment causes mud and water to bead and shed rather than soak into the fabric. In a muddy CX race, a non-treated jersey can absorb significant water weight and become cold and uncomfortable. If you race in dry conditions or only do occasional CX, a non-treated jersey is fine. For regular muddy racing, DWR is a significant performance advantage.
Cycling Jersey · Cyclocross Jersey
Do I need a DWR-treated jersey for cyclocross?
Related gear types
If this answer nudged you toward a different style, these guides compare specs and trade-offs.

Aero Race Jersey
$100 – $400
Ultra-form-fitting jersey engineered for maximum aerodynamic efficiency in competitive road racing.
compressive fitelongated sleevesaero-optimized fabrics

Mountain Bike Jersey
$35 – $180
Durable, loose-fitting jersey designed for the demands of off-road riding and trail conditions.
loose or relaxed fitdurable fabricsabrasion-resistant panels
More questions
- Can I use a regular road jersey for cyclocross racing?
- Why do cyclocross jerseys have fewer pockets than road jerseys?
- What should I wear under my cyclocross jersey for cold races?
- How should a cyclocross jersey fit compared to a road jersey?
