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Not content to rest on our laurels, we reengineered our bestselling underwear with a smooth cotton micro mesh (plus stretch) for maximum breathability and comfort.
This is an everyday pair that’s uniquely equipped to handle humidity—whether you’re laying in bed or biking to work. Impossibly light and airy (hence the name), you may even forget they’re there…
Includes 3 pairs. Also available in singles. Shop individual colors or build your own bundle.
Men's Underwear & Briefs
| US Size | Waist (in) | Hip (in) |
|---|---|---|
| S | 28–30 | 34–36 |
| M | 31–33 | 37–39 |
| L | 34–36 | 40–42 |
| XL | 37–39 | 43–45 |
| XXL | 40–42 | 46–48 |
Men's Tops, T‑Shirts & Sweatshirts
| US Size | Chest (in) | Shoulder (in) | Sleeve Length (in) |
|---|---|---|---|
| S | 35–37 | 17–18 | 32–33 |
| M | 38–40 | 18–19 | 33–34 |
| L | 41–43 | 19–20 | 34–35 |
| XL | 44–47 | 20–21 | 35–36 |
| XXL | 48–51 | 21–22 | 36–37 |
Men's Pants & Bottoms
| US Size | Waist (in) | Hip (in) | Inseam (in) |
|---|---|---|---|
| 28 | 28 | 34–35 | 32 |
| 30 | 30 | 36–37 | 32 |
| 32 | 32 | 38–39 | 33 |
| 34 | 34 | 40–41 | 33 |
| 36 | 36 | 42–44 | 34 |
| 38 | 38 | 45–47 | 34 |
| 40 | 40 | 48–50 | 35 |
Men's Coats, Jackets & Outerwear
| US Size | Chest (in) | Shoulder (in) | Sleeve Length (in) |
|---|---|---|---|
| S | 36–38 | 17.5–18.5 | 33–34 |
| M | 39–41 | 18.5–19.5 | 34–35 |
| L | 42–44 | 19.5–20.5 | 35–36 |
| XL | 45–48 | 20.5–21.5 | 36–37 |
| XXL | 49–52 | 21.5–22.5 | 37–38 |
Men's Socks (Shoe Size)
| Sock Size | US Men Shoe Size |
|---|---|
| S | 6–8 |
| M | 8–10 |
| L | 10–13 |
| XL | 13–15 |
Backpacks & Men’s Accessories
| Size | Dimensions (H × W × D, in) | Capacity |
|---|---|---|
| Small | 16 × 10 × 5 | 18‑22L |
| Medium | 18 × 12 × 6 | 24‑28L |
| Large | 20 × 13 × 7 | 30‑35L |
* All measurements are in inches. Measure over light clothing for accuracy.
* If you are between sizes, we recommend sizing up for a more comfortable fit.
* Actual garment fit may vary slightly by style, fabric stretch and cut.
Not content to rest on our laurels, we reengineered our bestselling underwear with a smooth cotton micro mesh (plus stretch) for maximum breathability and comfort.
This is an everyday pair that’s uniquely equipped to handle humidity—whether you’re laying in bed or biking to work. Impossibly light and airy (hence the name), you may even forget they’re there…
Includes 3 pairs. Also available in singles. Shop individual colors or build your own bundle.
- Supportive flyless pouch
- Targeted cool zones
- Moisture-wicking
- No-roll waistband
- Stay-put legs
Looking for the same underwear in a performance fabric? Try the original AIRKNITˣ.