Men’s Merino Wool Long Johns | Natural Base Layer Leggings
These men’s merino wool long johns are designed as a natural base layer for cold weather, travel, outdoor activity, and everyday comfort. Made from 98% merino wool with 2% elastane for flexibility, they regulate temperature, resist odor, and feel soft directly against the skin.
The perfect foundation for your winter wardrobe.
No synthetics. Non-mulesed & non-superwash merino wool. Certified farms. Fully biodegradable at end of life.
Natural Base Layer Comfort
Most thermal underwear today is made from polyester or synthetic fabrics that trap heat and moisture.
Designed as a breathable natural base layer, they regulate temperature, wick moisture, and stay comfortable throughout the day. Whether you’re traveling, spending time outdoors, or layering during colder months, merino wool adapts to your body and keeps you feeling balanced.
Why Merino Wool Works So Well for Base Layers
Merino wool is one of nature’s most advanced performance fibers. Unlike synthetic fabrics, merino works with your body’s natural temperature regulation.
Why You’ll Love It
- Natural temperature regulation
- Breathable moisture management
- Odor resistance during long wear
- Soft and comfortable against the skin
- Lightweight warmth without bulk
Composition
98% Merino Wool / 2% Elastane
Weight: 240g/m² jersey knit
Fiber fineness: Under 19.5 microns (non-itch)
Treatment: Untreated (no Superwash / no plastic resin coating)
Origin: Made in Poland
Fit Note
| Size | EUR | UK | Waist | Hips | Inseam |
|---|---|---|---|---|---|
| S | 44–46 | 30R–32R | 74–82 | 91.5–97.5 | 82 |
| M | 48–50 | 33R–34R | 82–90 | 97.5–103.5 | 83 |
| L | 52–54 | 36R–38R | 90–98.5 | 103.5–109.5 | 84 |
| XL | 56–58 | 40R–42R | 98.5–107.5 | 109.5–115.5 | 84.5 |
| XXL | 60–62 | 44R–46R | 107.5–116.5 | 115.5–121.5 | 85 |
(in cm).
Care
Machine wash cold (30°C) on wool cycle. Use wool-specific detergent. Do not tumble dry. Reshape while damp and dry flat.
Made in Poland
Ethically crafted with care
Shipping Policy
Orders are processed and shipped within 5-7 business days from our facility in Poland. You'll receive a shipping confirmation email with tracking information once your order has shipped.
Switzerland courier delivery - CHF 100; free above orders of CHF 200
EU countries courier delivery - CHF 10
UK courier delivery - CHF 10; free above orders of CHF 200
US courier delivery - CHF 20; free above orders of CHF 200
Customs & Import Duties
For orders shipped outside the European Union, the recipient is responsible for any customs duties, import taxes, or brokerage fees that may apply. These charges vary by country and are determined by your local customs authority.
(soon, orders to Switzerland will be customs free. At the moment, you can benefit from a store credit equal to the customs you pay, to use on future orders at Swiss Impact Store.)
Refund Policy
Once we receive your return, we'll inspect the items and process your refund within 5-7 business days. Refunds are issued to your original payment method.
Non-Returnable Items
For hygiene reasons, underwear and swimwear with the hygiene seal removed cannot be returned. Sale items marked as "Final Sale" are also non-returnable.
Cancellation / Return / Exchange Policy
We offer returns within 30 days of delivery. Items must be unworn, unwashed, and in their original condition with all tags attached.
How to Return
- Email us at [email protected] with your order number and reason for return or
- The brand will confirm your return and provide the return address
- Pack your items securely in the original packaging if possible
- Ship your return using your preferred carrier (return shipping costs are covered by the customer)
Exchanges
For exchanges (different size or color), please return your original order and place a new order for the desired item. This ensures the fastest processing time.
