10 Best Merino Thermal Set B of December 2025

• Thermal long john set includes matching top and bottom
• Extra soft insulation and warmth
• Moisture wicking fabric for comfort
• Quick-dry fabric
• Stretches for a better performance fit

Fruit of the Loom

• Package Includes: 1 - Women’s 250g/m² merino wool thermal leggings - Large Charcoal Gray
• SUPER SOFT: 100% all natural superfine 18.5-micron Merino wool ensures comfort all day long – no itch! COMFORTABLE & CONVENIENT: Quick-drying legging bottom features a loop for hang drying while you’re camping, hiking, hunting, working, playing sports, skiing, snowboarding, or partaking in any outdoors activity.
• BREATHABLE: Keeping you cool in summer and warm in winter, MERIWOOL’s 250g/m2 weight inter-lock knit Merino wool can be used as a base layer or mid-layer, but won’t weigh you down. EASY CARE: Your legging pants are machine-washable on cold setting and safe to tumble dry on low heat with like colors, so they're ready when you are for your next adventure.
• WICKING & ODOR RESISTANCE: Merino wool’s natural wicking and odor-resistant properties keep you dry and comfortable while active in cold weather. Through the process of wicking, Merino wool is the most breathable fabric and absorbs moisture better than any other fibers. Wicking refers to a fabric’s ability to pull moisture away from your body and keep you comfortable.
• EXCEPTIONAL CUSTOMER CARE: If your MERIWOOL Women’s Leggings don’t perform to your satisfaction, return it to us within 30 DAYS along with proof of purchase for a hassle-free refund, exchange, or replacement. Includes a 1-YEAR limited manufacturer’s warranty, which covers manufacturing and material defects. For best results: hand wash and lay flat to dry.

MERIWOOL

• Premium Grade Fabrics: 92% ultra-soft polyester and 8% spandex, This boys thermal underwear base layer gives protection against the cold winter days whilst remaining discreet and comfortable..The boy long johns can still comfortable,warm and color-fast after many washes.
• Good Moisture Absorption and Sweat Elimination: When your little ones sweat, this thermals base layer can wick moisture away from his skin, and dry quickly and insulating from the cold.
• Suitable or Indoor or Outdoor Wear : Perfect for your son during cold winters, school, ski or snow holidays, camping, pyjamas, hiking, outdoor trips. The thermals can be worn as comfy pajamas on cold, chilly nights.
• Soft and Comfortable: Offers full mobility and freedom of movement. Wear-resistant material and shrink resistant. This thermal underwear for boys set will do its job no matter how active you are.
• 1 PIECE SET: The thermal underwear consists of 2 parts,top and pants,and there are eight colors for you to choose: Black, Grey, Blue, Charcoal, Christmas, Jade, Navy, Red.(XS S M L XL). Classic colors for different fashion choose.

ViCherub

• MIDWEIGHT – Womens Merino Base Layer Set Available in: Lightweight = 165 g/m², Midweight = 250 g/m². FREE MERINO WOOL HIKING SOCKS ($21 VALUE!) – Package includes Midweight Merino wool base layer top, Merino Leggings 250 g/m² + Merino Wool Hiking Socks. MAKES A GREAT GIFT!
• SUPER SOFT & COMFORTABLE – 100% Superfine 18.5 Micron Womens Merino Wool Pants provide all day comfort and no itch! Designed for daily wear without rubbing and overheating of regular cotton.
• MOISTURE WICKING & ODOR RESISTANT – Merino Womens Wool Pants natural wicking and odor-resistant properties allow it to absorb moisture better than any other fabric, keeping you dry and fresh.
• BREATHABLE – For longer lasting wear, hand wash and lay flat to air dry. Womens merino wool base layer top and bottoms set naturally regulates body temperature to keep you comfortable all year round.
• LIFETIME WARRANTY – All Merino.tech Products are covered by our LIFETIME WARRANTY. If your womens wool long underwear does not perform to your satisfaction, return it within 60 DAYS for a hassle-free refund, exchange, or replacement.

Merino.tech

• 【100% MERINO WOOL】LAPASA uses a 200g/m² interlock knit Merino wool to ensure that this thermal will be your choice in cool weather. These thermal underwear are made with 18.5 micron Merino wool fibers giving them a soft and smooth feel without the itch associated with traditional wool clothes. The STANDARD 100 by OEKO-TEX rating ensures product safety and that this textile has been tested for harmful substances.
• 【COMFORTABLY WARM】One of the benefits of Merino wool is that the material provides effective insulation while maintaining breathability to keep you at the optimal temperature. As a lightweight thickness thermal, this can easily be worn as a base layer that will wick away moisture while keeping you cosy. You can comfortably wear these all day from sunup, to past sundown for whatever comes you way.
• 【IT GOES WHERE YOU GO】The durable 4-way stretch rib knit hem and snug fit will flex, conform, and move with your body to maintain range of motion and comfort. Whether you're camping, hiking, snowboarding, working out, working, or just taking it easy, this comfy thermal has got you covered.
• 【STAYS FRESH】Whatever the season, this light thermal will be a solid choice in your wardrobe as the Merino wool has naturally hygienic properties to keep you fresh through the day regardless of the weather.
• 【LIGHT】The excellent warmth to weight ratio of this thermal make for an ideal choice while traveling and packing when you want some lightweight long johns during your adventures.

LAPASA

• 2-Layer construction
• 100% Merino wool exterior combined with lifa technology interior & fleece reinforcement on knees & elbows
• Non itch & Flat Lock seams
• 215g/M fabric

Helly-Hansen

• MIDWEIGHT – Womens Merino Base Layer Available in: Lightweight = 165 g/m², Midweight = 250 g/m², Heavyweight = 320 g/m². FREE MERINO WOOL HIKING SOCKS ($21 VALUE!) – Package includes Merino Wool Base Layer Women Wool Leggings Midweight 250 g/m² + Merino Wool Hiking Socks. Cool Packaging! MAKES A GREAT CHRISTMAS GIFT!
• SUPER SOFT & COMFORTABLE – 100% Superfine 18.5 Micron Womens Merino Wool Pants provide all day comfort and no itch! Designed for daily wear without rubbing and overheating of regular cotton.
• MOISTURE WICKING & ODOR RESISTANT – Merino Womens Wool Pants natural wicking and odor-resistant properties allow it to absorb moisture better than any other fabric, keeping you dry and fresh.
• EASY CARE – Washer/dryer safe. For longer lasting wear, hand wash and lay flat to air dry. Wool thermal womens naturally regulates body temperature to keep you comfortable all year round.
• LIFETIME WARRANTY – All Merino.tech Products are covered by our LIFETIME WARRANTY. If your womens wool long underwear does not perform to your satisfaction, return it within 60 DAYS for a hassle-free refund, exchange, or replacement.

Merino.tech

• Package Includes: 1 - Men’s 250g/m² merino wool thermal leggings
• SUPER SOFT: 100% all natural superfine 18.5-micron Merino wool ensures comfort all day long – no itch! EASY CARE: Your thermal pants are machine-washable on cold setting and safe to tumble dry on low heat with like colors, so it’s ready when you are for your next adventure. MEN’S SIZE OPTIONS: XS to 3XL.
• BREATHABLE: Keeping you cool in summer and warm in winter, MERIWOOL’s 250g/m2 weight interlock-knit Merino wool can be used as a base layer or mid-layer, but won’t weigh you down. COMFORTABLE & CONVENIENT: Quick-drying pants feature a loop for hang drying while camping, hiking, hunting, working, playing sports, skiing, or partaking in any outdoors activity.
• WICKING & ODOR RESISTANCE: Merino wool’s natural wicking and odor-resistant properties keep you dry and comfortable while active in cold weather. Through the process of wicking, Merino wool is the most breathable fabric and absorbs moisture better than any other fibers. Wicking refers to a fabric’s ability to pull moisture away from your body and keep you comfortable.
• EXCEPTIONAL CUSTOMER CARE: If your MERIWOOL Men’s Leggings don’t perform to your satisfaction, return it to us within 30 DAYS with proof of purchase for a hassle-free refund, exchange, or replacement. Includes a 1-YEAR limited manufacturer’s warranty, which covers manufacturing and material defects. For best results: hand wash and lay flat to dry.

MERIWOOL

• MIDWEIGHT — Mens Merino Base Layer Available in: Lightweight = 165 g/m², Midweight = 250 g/m². FREE MERINO WOOL HIKING SOCKS ($21 VALUE!) – Package includes Midweight  Merino wool base layer mens 250 g/m² + Merino Wool Hiking Socks. MAKES A GREAT GIFT!
• SUPER SOFT & COMFORTABLE – 100% Superfine 17.5 Micron merino wool base layer set mens provides all day comfort and no itch! Merino wool long underwear men set was designed for daily wear without rubbing, overheating, or bunching of regular cotton.
• MOISTURE WICKING & ODOR RESISTANT – Natural wicking and odor-resistant properties of merino wool thermal underwear allow it to absorb moisture better than any other fabric, keeping you dry and fresh.
• BREATHABLE – For longer lasting wear, hand wash and lay flat to air dry. Mens wool long johns sets naturally regulate body temperature to keep you comfortable all year round.
• LIFETIME WARRANTY – All Merino.tech Products are covered by our LIFETIME WARRANTY. If your Merino.tech merino wool base layer top mens and long johns set does not perform to your satisfaction, return it within 60 DAYS for a hassle-free refund, exchange, or replacement.

Merino.tech

• MERINO BENEFITS: The breathable interlock knit merino wool is perfect for maintaining thermal comfort to keep you cool when it's hot, and warm when it's cold so you can stay comfortable in any season. 🐑Our 100% natural Australian merino wool is ethically sourced from non-mulesed sheep.
• STAYS FRESH: These moisture-wicking and odor-resistant merino base layer tops have natural hygienic properties to keep you fresh even after extended use during your travels.
• IT GOES WHERE YOU GO: The durable 4-way stretch rib knit hem and snug fit will flex, conform, and move with your body to maintain range of motion and comfort. Whether you're camping, hiking, snowboarding, working out, working, or just taking it easy, this comfy thermal has got you covered.
• LIGHT COMFORT: Merino wool's excellent warmth to weight ratio is ideal when packing light for your travels. The 18.5 micron Merino wool fibers are soft and smooth without the itch of traditional wool.
• UV PROTECTION: The UPF 50+ rating fabric blocks 98% of the sun's UV rays to keep you safely covered and prevent sunburns.

LAPASA