Sealskinz Syderstone Cap
Designed to fit neatly under your helmet, the waterproof Sealskinz Syderstone cycling cap keeps the sun and sweat out of your eyes so you can keep your focus on the road ahead.
- Thin and light construction can be worn under protective headwear
- Aquasealz™ 3-layer waterproof construction is warm and durable
- Internal sweatband for moisture control and comfort
- Elasticated back for snug fit
- Reflective fabric for enhanced visibility in low light
Imported.
View all Sealskinz Cycling Caps| Best Use | Cycling |
|---|---|
| Hat Style | Cycling Cap |
| Fabric | 100% polyester |
| Lining Fabric | 100% polyester |
| Waterproof | Yes |
| Type of Waterproofing | Aquasealz waterproof membrane |
| Moisture Wicking | Yes |
| Visor/Brim | Yes |
| Head Circumference | S/M: 21.6-22.4 inches |
| Gender | Unisex |
| S | M | L | XL | S/M | L/XL | XXL | |
|---|---|---|---|---|---|---|---|
| Head Circumference | 21.7 | 22.4 | 23.2 | 24 | 21.7-22.4 | 22.8-23.2 | 24.4-24.8 |
Sizing Notes
Measurements are stated in inches.
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Elastic band is bulky
The brim is a good size to shade the sun. I bought the correct size S/M based on the measurements given. The elastic band at the back of the cap bunches. This added bulk is uncomfortable and also prevents the cap to fit under my helmet. I had to return it.

