Shirt Size Guide
Archived sizing reference for the original Hydration Shirt. These measurements apply to that shirt only. For current products, use the sizing guidance on the relevant product page.
The Hydration Shirt is designed to fit snug for maximum effect. Cut is long. Unisex sizing.
| Size | Chest (Inches) | Height |
| Small | 34" - 36" | 5'6" and under |
| Medium | 36" - 39" | 5'6" - 5'11" |
| Large | 39" - 42" | 5'11" - 6'1" |
| X-Large | 42" - 46" | 6'1" - 6'4" |
| XX-Large | 46" and up | 6'5" and up |
