Size chart - Baselayer
Athlete Series Base layer
The APEX base layer is made from a tight-fit polyester/elastane in order to produce the most accurate data. If you are between sizes we recommend that you purchase the smaller of the two.
Adult Chest Size
| Inches | Centimeters | |
| Small | 28.5 - 31" | 72 - 76 cm |
| Medium | 31.5 - 33.5" | 77 - 85 cm |
| Large | 34 - 37.5" | 86 - 94 cm |
| X Large | 38 - 41.5" | 95 - 104 cm |
Youth Chest Size
| Inches | Centimeters | |
| Youth Small | 25.5 - 26.5" | 64 - 68 cm |
| Youth Medium | 26.5 - 27.5" | 68 - 70 cm |
| Youth Large | 27.5 - 28.5" | 70 - 72 cm |