Thermal clothing set Finntrail THERMO S Black 6304
Code: 6304Black-XS-
Finntrail THERMO-S Black 6304 thermal underwear
Finntrail THERMO-S Black 6304 thermal underwear – a functional base layer designed for active movement in cold weather conditions.
This base layer set efficiently wicks moisture away from the body and helps retain body heat. The ergonomic cut and flexible material ensure unrestricted movement, while flat seams and micro polyester fabric provide maximum comfort.
Key benefits
- Efficient moisture wicking – quickly moves sweat away from the skin to keep you dry
- Heat retention – helps maintain body warmth in low temperatures
- Flexible material – adapts to body movement without restriction
- Ergonomic fit – ensures a close and comfortable fit for layering
- Flat seams – reduce friction and prevent skin irritation
- Micro polyester fabric – provides softness and effective moisture control
- Lightweight and breathable layer – delivers all-day comfort
- Base layer design – ideal for wearing under technical outerwear
Extreme conditions
Designed for use in temperatures from -25°C to +10°C, where moisture management and thermal balance are essential.
Perfect for active outdoor use in cold weather conditions.
Comfort
The ergonomic design and flexible fabric provide full freedom of movement.
Flat seams and soft material help prevent discomfort during extended wear.
Who is it for
- Active outdoor use
- Winter sports
- Layering in cold seasons
- Long-duration activities
- Anyone looking for a reliable base layer
Not sure which Finntrail size fits you best? We will help.
Email us at pagalba@finntrail.lt and send:
- your height
- your hip measurement
Based on the manufacturer’s size charts and practical experience, we will recommend the most suitable size and answer any additional questions.
Men jackets, suits, thermals size
CENTIMETRESHeight Chest girth Waist girth Hips Inseam Sleeve XXS 158-162 80-86 70-76 82-88 53-57 53-57 XS 163-167 84-90 74-80 86-92 53-57 55-59 S 168-172 88-98 78-88 90-100 57-61 57-61 SK 168-172 100-110 90-100 102-112 57-61 57-61 M 173-177 96-102 86-92 98-114 57-61 59-63 MK 173-177 108-117 98-106 110-118 59-63 59-63 ML 180-190 96-102 86-92 98-114 63-65 63-65 L 178-182 100-110 90-100 102-112 61-64 61-64 LK 178-182 119-125 106-114 118-128 61-64 61-64 XL 183-187 108-117 98-106 110-118 61-64 63-65 XLK 185-190 124-133 114-122 126-134 63-65 63-65 XXL 185-195 116-125 106-114 128-128 63-65 64-67 XXXL 190-200 124-133 114-122 126-134 65-69 65-69 1Measure your chest3Measure your inseam2Measure your hipsThese are not the garment dimensions. Measurements refer to body size. FINNTRAIL gear offers extra room, as it is manufactured to enhance comfort and freedom of movement. The sizing may vary from your casual size. If you are between sizes, please send your measurements to our customer service team. We will be glad to help you.Product delivery
We receive goods at our central warehouse twice per week: on Tuesdays and Fridays.
Depending on the order submission time, goods are included in the corresponding delivery cycle:
Order submission time Goods received Notes Until Tuesday 09:00 Friday Standard schedule. Until Friday 09:00 Next Tuesday Orders placed after 09:00 are moved to the next cycle. Important Due to holidays, inventory checks or other circumstances, delivery may be delayed by 1–3 days.
- Orders are shipped the same day they arrive at the central warehouse.
- Delivery is available to all parcel lockers in Lithuania or by courier to your home.
- Delivery is free of charge.
Returns
Please inform us about a planned return by email at pagalba@finntrail.lt or by phone +370 614 98366.
- Products can be returned within 30 days from the date of receipt.
- The returned item must be unused, with all tags attached and in the original packaging.
- Returns are completely free.
- Together with the notification about the delivered parcel you will receive a return code allowing you to return the item via any parcel locker.
Available solutions after returning the product:- We will replace it with another size.
- We will suggest the most suitable alternative.
- The refund is issued within 1–2 business days after receiving the returned item.
Membrane waterproofing and breathability
Membrane fabric is usually described using two numbers, often separated by a slash: waterproofness and breathability. The first number indicates waterproofness, the second indicates breathability.
?Waterproofing
This is a sliding scale measured in mm that shows how high a column of water you can suspend over the membrane before it starts to let moisture through.
Waterproof Rating Conditions 0–10,000 mm Light rain, dry snow, light pressure. 11,000–15,000 mm Moderate rain, average snow, light pressure. 16,000–20,000 mm Heavy rain, wet snow, some pressure. 20,000 mm+ Heavy rain, wet snow, high pressure. ?Breathability
This is the amount of moisture by weight that can pass through one square metre of fabric over a period of 24 hours. It is commonly measured in g/m²/24 hrs.
Breathability Rating Level of Breathability 0–5,000 g/m²/24 hrs Low – light exercise. 5,000–15,000 g/m²/24 hrs Medium – medium to high energy activity. 15,000 g/m²/24 hrs+ High – vigorous sustained activity.
