San Francisco 49ers 2026 NFL Rivalries Sideline 39THIRTY Flex Cap Black
New Era American Football 2026 NFL Rivalries On-Field Siedeline Collection 39THIRTY M-Crown Stretch-Fit Hat from your San Francisco 49ers.
Built for the Sideline. Engineered for Game-Day Energy.
Product information
New Era American Football 2026 NFL Rivalries On-Field Siedeline Collection 39THIRTY M-Crown Stretch-Fit Hat from your San Francisco 49ers.
Built for the energy of game day: The completely redesigned 2026 NFL Sideline Collection combines performance-driven functionality, premium comfort, and unmistakable team pride. This San Francisco 49ers Flex Fit hat brings the latest Rivalries Sideline look to your fan style with lightweight performance materials and bold team details.
Design & Details
- Official 2026 NFL Rivalries On-Field Sideline Collection
- Embroidered team logo on the front
- Embroidered NFL Shield logo on closed rear
- New Era flag logo on the left side
- Alternate logo on right cap panel
- Team-color piping along the visor edge
- Stitched ventilation eyelets on the crown
- Lightweight, water-resistant nylon stretch fabric
Material & Fit
- 39THIRTY M-Crown: Structured mid-crown fit with a modern, sporty silhouette
- Stretch-Fit: Elastic fit without closure for comfortable, secure wear
- Curved visor for a classic football look
- Cushioned quick-dry sweatband for enhanced moisture management
- Ideal for training, everyday wear, and gameday
- Material: 85% nylon and 15% elastane
Properties
| Color: | Black |
|---|---|
| Material: | Elastane, Nylon |
| Product category: | Caps |
| Sport: | NFL - American Football |
| Target group: | Unisex |
| Team: | San Francisco 49ers |
| Product number: | 722165.G10 |
Login
SIZE | CM | INCH |
|---|---|---|
| S/M | 56.8 - 58.7 | 22 3/8 - 23 1/8 |
| M/L | 58.7 - 60.6 | 23 1/8 - 23 7/8 |
| L/XL | 60.6 - 62.5 | 23 7/8 - 24 5/8 |
Measure Your Head Size – It’s Easy:
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Use a tape measure (or string + ruler). For best accuracy, ask someone to help.
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Wrap it around your head: Keep it level and smooth — just above your ears and eyebrows.
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Read the measurement (in cm or inches) and use the size chart to find your cap size.