Men’s Thermal T-Shirt & Long John Set – Warm Winter Baselayer (S–XXL)

Stay warm and comfortable this winter with our Men’s Thermal Underwear Set, designed for maximum insulation without compromising on breathability. This two-piece set includes a long-sleeve thermal T-shirt and matching long john bottoms, making it the perfect baselayer for cold UK weather, workwear, sports, and outdoor activities.

Crafted from a 50% cotton, 50% polyester blend with a 0.45 TOG rating, these thermals trap warm air close to your skin while remaining lightweight and flexible. The ribbed construction naturally adapts to your body shape for a snug yet comfortable fit. The soft brushed inner lining enhances heat retention while providing a smooth feel against the skin.

Key Features

• Two-Piece Set – Includes thermal T-shirt and long johns

• 0.45 TOG Rating – Retains heat by holding warm air close to skin

• Soft Brushed Inner – Extra comfort with high-performance insulation

• Cotton & Polyester Blend – Durable, breathable, and flexible

• Comfort Fit – Ribbed design shapes to your body contours

• Open Fly Long Johns – Practical everyday wear

• Colours Available – Black, White, and Charcoal

• Sizes – S, M, L, XL, XXL

Size Guide

T-Shirt (Chest in inches)

• Small: 35–36”

• Medium: 37–39”

• Large: 40–42”

• XL: 43–44”

• XXL: 45–46”

Long Johns (Waist in inches)

• Small: 29–32”

• Medium: 33–35”

• Large: 36–38”

• XL: 39–40”

• XXL: 41–43”

Note: Sizes are approximate. If between sizes, we recommend ordering one size up for comfort.

Benefits

• Keeps you warm in freezing temperatures

• Lightweight fabric for layering under workwear or casual clothes

• Ideal for construction, outdoor jobs, winter sports, or daily wear

• Breathable blend prevents overheating

• Easy-care: machine washable at 30°C (do not tumble dry)

Frequently Asked Questions (FAQ)

Q1: What material is this thermal set made from?
It’s made from a 50% cotton, 50% polyester blend for warmth, durability, and flexibility.

Q2: Is this a full set or sold separately?
This listing includes both the thermal T-shirt and long john bottoms.

Q3: What does the 0.45 TOG rating mean?
It measures thermal insulation. A 0.45 TOG rating means the fabric retains more warm air, keeping you comfortable in cold weather.

Q4: Are these thermals suitable for outdoor work?
Yes, they are ideal for construction, warehouse, delivery, and other outdoor jobs, as well as sports and casual wear.

Q5: How should I wash these thermals?
Machine wash at 30°C, wash dark colours separately, and avoid tumble drying to maintain quality.

Q6: Do the long johns have an open fly?
Yes, the long johns feature a classic open fly design for practicality.

Q7: What sizes are available?
Available in S, M, L, XL, and XXL, with chest and waist measurements listed in the size guide.

Q8: Are these comfortable to wear all day?
Yes, the soft brushed inner lining ensures comfort, even during long shifts or active days.