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The only choice for Ultimate Thermal Performance
When temperatures fall, this 1 pair pack of Heat Holders Thermal Long Johns will keep your legs nice and toasty. Heat Holders thermal construction holds more warm air close to the skin, keeping you warmer for longer!Heat Holders
Men's Thermal & Base Layer Underwear Size Guide
Men's Thermal Tops
| Small | Medium | Large | Extra Large | XX Large | |
| Chest (inches) | Up to 37 | 38-40 | 41-43 | 44-46 | 47-49 |
| Chest (cm) | Up to 95 | 96-103 | 104-111 | 112-118 | 119-125 |
Men's Base Layer Tops
| Small | Medium | Large | Extra Large | XX Large | |
| Chest (inches) | 34-36 | 38-40 | 42-44 | 46-48 | 50-52 |
| Chest (cm) | 86-91 | 97-102 | 107-112 | 117-122 | 127-132 |
Men's Thermal Bottoms
| Small | Medium | Large | Extra Large | XX Large | |
| Waist (inches) | Up to 32 | 33-35 | 36-38 | 39-41 | 42-44 |
| Waist (cm) | Up to 81 | 82-90 | 91-98 | 99-105 | 106-112 |
Men's Base Layer Bottoms
| Small | Medium | Large | Extra Large | XX Large | |
| Waist (inches) | 28-30 | 32-34 | 36-38 | 40-42 | 44-46 |
| Waist (cm) | 71-76 | 81-86 | 91-97 | 102-107 | 112-117 |
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