Our lightest and airiest base layer wicks moisture away from your skin, while the open mesh helps hold the jersey up and away from the skin. It’s good for warm conditions, and some riders even like it on a hot day, as it allows airflow between the jersey and skin.
Castelli Sizing Chart


- Chest : measure under your arms, around the fullest part of your chest
- Waist : measure around your natural waistline, keeping the tape a bit loose
- Hip : measure around the largest part of your hip
- Inseam : using pants that fit well, measure the crotch seam to the ankle bone
Castelli Men (UNISEX) Chart
| S | M | L | XL | XXL | |
|---|---|---|---|---|---|
| Chest (inch) | 36 | 37.5 | 39 | 41 | 43 |
| Waist (inch) | 31 | 33 | 34.5 | 36.5 | 38.5 |
| Hip (inch) | 37 | 38.5 | 40 | 42 | 44 |
| Inseam (inch) | 32.2 | 32.6 | 33 | 33.5 | 33.8 |
Castelli Women Chart
| S | M | L | XL | XXL | |
|---|---|---|---|---|---|
| Chest (inch)) | 31 | 33 | 35 | 37 | 39 |
| Waist (inch) | 24.5 | 26.5 | 28.5 | 30.5 | 32 |
| Hip (inch) | 34 | 36 | 38 | 40 | 42 |
| Inseam (inch) | 29.5 | 29.9 | 30.3 | 30.7 | 31.1 |
MEASURING : for best results, take measurements over your underwear. If your measurements fall between sizes, we suggest that you size up for better fit.











