Men's Thermal Long John Underwear – Open Crotch Base Layer Pants (M–4XL, 8 Colors)

Men's Thermal Long John Underwear – Stay Warm, Move Freely

Built for cold Canadian winters, these men's thermal long john pants deliver slim-fit warmth without the bulk. Made from soft modal fabric with an open-crotch design for unrestricted movement — perfect as a base layer under work pants, ski gear, or everyday wear. Available in 8 colors and sizes M to 4XL.

Key Features

• Soft modal fabric — lightweight, breathable, and gentle on skin
• Slim fit design — layers easily under any pants without bunching
• Open crotch construction — maximum freedom of movement
• 8 color options — White, Dark Grey, Black, Red (Long Johns + Underwear styles)
• Extended sizing — available in M, L, XL, 2XL, 3XL, 4XL
• Single layer, thin profile — ideal for layering in fall and winter

Who This Is For

• Men who need a reliable base layer for cold weather commutes or outdoor work
• Skiers, hikers, and winter sports enthusiasts looking for slim thermal coverage
• Anyone who wants comfortable, breathable underwear that stays warm without overheating
• Shoppers in Canada and the USA looking for affordable quality thermal wear

Product Details

• Fabric: Modal
• Waist Type: Low waist
• Fleece Lined: No
• Thickness: Thin (single layer)
• Fit: Slim
• Function: Thermal warmth
• Style: Long Johns & Underwear (8 color variants)
• Sizes: M, L, XL, 2XL, 3XL, 4XL
• Includes: 1 × Thermal Pants

Size Chart

Unit: CM — Please measure yourself before ordering.

Sizing Notes: Asian sizing runs 1–2 sizes smaller than North American/European sizing. If you're between sizes, size up. Please allow 2–3 cm variance due to manual measurement. Colors may vary slightly between screens.

Why Shop at EX-STOCK Canada

• ✅ 90-day hassle-free returns — shop with complete confidence
• 🚚 Free shipping to Canada & USA on qualifying orders
• 🔒 Secure checkout — trusted by thousands of Canadian shoppers
• 📦 Fast fulfillment — orders processed and shipped promptly
• 💬 Responsive customer support — we're here if you need us

Explore more in our Men's Underwear Collection. Also check out our New Arrivals and browse our On Sale Products for great deals.

FAQ

Q: Can these be worn as outerwear?
A: No — these are designed as a base layer and should be worn under pants or other clothing.

Q: What is the open crotch design?
A: The open crotch construction allows for unrestricted movement and easier wear, making them ideal for active use under work or outdoor gear.

Q: What sizes are available?
A: Available in M, L, XL, 2XL, 3XL, and 4XL. Please refer to the size chart above before ordering.

Q: What is the return policy?
A: EX-STOCK Canada offers a 90-day return policy. Items must be returned unused and in original condition. Contact us within 90 days of delivery.

Q: How long does shipping take?
A: Standard shipping to Canada and the USA typically takes 7–15 business days depending on your location.