REI Co-op On The Trail Cap
If your everyday cap doubles as your sweat-stained running buddy, it's time for the REI Co-op On The Trail cap. Its internal sweatband, side vents and wicking fabric are made for the trail.
- Elastic polyester fabric fits snugly onto your head
- Wicks moisture and dries quickly to help you stay cool and comfortable on the trail
- UPF 50+ sun protection
- Laser-cut ventilation holes on the sides enhance breathability
- Internal sweatband keeps sweat out of your eyes
- Flexible brim and bungee closure with cordlock let you adjust the fit
- Bungee closure wears more softly against the head than traditional cap closures
- One size fits most
- Hand-wash with cold water; line dry
- REI Co-op brand is certified to The Climate Label; we actively fund efforts to reduce carbon emissions across our business and support climate projects around the world
Imported.
View all REI Co-op Men's Ball CapsBest Use | Hiking Trail Running |
---|---|
Hat Style | Ball Cap |
Fabric | 95% polyester/5% elastic |
Lining Fabric | Main lining: polyester; sweatband: 91% polyester/9% spandex |
Sun-Protective Fabric | Yes |
UPF Rating | 50+ |
Moisture Wicking | Yes |
Quick Drying | Yes |
Visor/Brim | Yes |
Head Circumference | 21-24 inches |
Length of Bill | 2.5 inches |
Gender | Unisex |
Sustainability | From a Climate Label Certified brand |
S | M | L | XL | One Size | S/M | L/XL | |
---|---|---|---|---|---|---|---|
Head Circumference | 21.5 - 22 | 22 - 22.75 | 22.75 - 23.5 | 23.5 - 24.2 | 21.5 - 23.5 | 21.5 - 23 | 23.25 - 24.25 |
Sizing Notes
All measurements are stated in inches.
Better gear is built together
From feedback to field testing, all of our gear is dialed-in by REI Co-op members. Their adventures informed every stitch and detail—making for better, longer-lasting gear.


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