Quick Summary
Chums Men’s Heatguard Thermal Long Johns are a thermal base layer in white, offered here in 4XL. They are described as having just the right weight for warmth and comfort, with body heat retained in cold conditions.
The fabric is a soft knit blend of 53% polyester and 47% cotton, and the inside leg measurement is approximately 27 inches. That gives buyers a clearer check on fit and layering before ordering.
Who It Is Best For
These long johns are for anyone looking for a thermal base layer to wear under clothes in colder conditions. The stated 4XL size and waist range make it important to check the selected fit before ordering.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Brand | Chums. |
| Product type | Men’s thermal long johns for use as a base layer. |
| Colour | White. |
| Size offered | 4XL, so check the selected size against your own fit requirements. |
| Waist sizes listed | M 32/35, L 35/38, XL 38/41, 2XL 41/44, 4XL 47/50, with waist given in cm. |
| Fabric blend | 53% polyester and 47% cotton. |
| Inside leg | Approximately 27 inches, which is useful for checking leg length before buying. |
| Care | Machine washable for easier cleaning. |
What To Know Before You Buy
Check the size carefully, as the listing covers several waist ranges and this version is 4XL. The inside leg is stated at approximately 27 inches, so it is worth comparing that with your preferred fit. If you are buying for layering, the close fit and thermal base layer design are the main things to confirm.
Pros: The blend of polyester and cotton gives a soft knit feel with a clear warmth-focused base layer use.
Cons: The fit depends on the selected size and waist range, so checking measurements matters.
Common Buyer Questions
What material are these thermal long johns made from?
They are made from a soft knit blend of 53% polyester and 47% cotton.
What size is this version?
This version is 4XL, so it is important to check the waist range before ordering.
Can they be washed in a machine?
Yes, they are machine washable.
What is the inside leg measurement?
The inside leg is approximately 27 inches.
Final Buying View
If you want a men’s thermal base layer in white and need the 4XL option, these Chums Heatguard long johns give you a clear fabric blend, waist sizing and inside leg measurement to compare before ordering. Check the selected size and fit details carefully so the item matches your needs.












