The Outdoor Research Sunbiolet sun hat’s got you covered afloat or ashore. UPF 50+ fabric shields you from sun, while strategically placed vents and wicking fabric in the crown keep you cool and dry.
Features
- Foam-stiffened brim keeps your hat afloat if it blows overboard; dark fabric under brim tones down water reflection
- Fabric is light, breathable water-resistant and quick-drying
- One-handed drawcord adjustment
- Crushable
Imported.
Technical Specs
| Best Use |
Hiking Watersports |
|---|---|
| Hat Style |
Sun Hat |
| Fabric |
86% nylon/14% ripstop polyester |
| Lining Fabric |
Nylon |
| Sun-Protective Fabric |
Yes |
| UPF Rating |
50 |
| Moisture Wicking |
Yes |
| Quick Drying |
Yes |
| Visor/Brim |
Yes |
| Head Circumference |
21.5-24 inches |
| Width of Brim |
3 inches |
| Gender |
Unisex |
Size Chart
| S | M | L | XL | S/M | L/XL | One Size | |
|---|---|---|---|---|---|---|---|
| Head Circumference | 21.5-22 | 22.25-22.87 | 23-23.62 | 23.87-24 | 21.5-22.87 | 23-24 | 21.5-24 |
Sizing Notes
Measurements are stated in inches unless otherwise indicated.
Measure around your head where the headwear would fit comfortably.

















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