Men's Base Layers, Thermals & Underwear
Base layers and thermals are essential for regulating your temperature all year round. They are designed to wick sweat away from you skin allowing you to feel comfortable during your outdoor adventures and in the winter they provide a layer of insulation to help you stay warm. They are great for a wide range of outdoor activities such as water sports, walking, skiing, cycling, and hiking to name a few. Browse through our collection of men's base layers, thermals, and underwear at Arran active.
Bawbags Cool De Sacs Fruit Bowl Technical Boxer Shorts - 3 Pack £34.95
9 in stock
Bawbags Cool De Sacs Fruit Bowl Technical Boxer Shorts - 3 Pack Feelin’ fruity? Well, you can shout it loud and proud with the new Cool De Sacs Fruit Bowl 3-pack underwear. They look fantastic and are more than ready for your lifestyle, whether you’re out and about or are having a lazy Sunday! ✔ Maximum comfort for any activity ✔ Moisture wicking fabric for a comfortable fit ✔ Quick drying technol…
Smartwool Mens Classic Thermal Merino Base Layer Crew £105.00
£95.00 4 in stock
Smartwool Mens Classic Thermal Merino Base Layer Crew Meet the better-than-ever Men's Classic Thermal Merino Base Layer Crew. We've updated this 100% Merino wool fan favorite with new colors and a new fit to improve functionality while enhancing aesthetics. Shoulder panels eliminate top shoulder seams, and a flatlock seam construction helps prevent chafing. Add one of our best base layers for cold…
Icebreaker Mens Merino 200 Oasis Long Sleeve Crewe Thermal Top £85.00
9 in stock
Icebreaker Mens Merino 200 Oasis Long Sleeve Crewe Thermal Top Our versatile, go-anywhere shirt made from breathable 100% merino wool jersey, the 200 Oasis Long Sleeve Crewe is our best-selling base layer top. Features 100% Merino wool - Soft, lightweight and naturally odour resistant fibre that keeps you warm when it's cold and cool when it's warm Gusseted underarms for mobility and comfort Offse…
Icebreaker Mens 175 Everyday Thermal Leggings £70.00
£65.00 4 in stock
Icebreaker Mens 175 Everyday Thermal Leggings Versatile year-round base layer bottoms made with 100% merino wool and a slim fit, the 175 Everyday Leggings offer premium breathability, odor-resistance and next-to-skin comfort. Features 100% Merino wool (excluding waistband) - Soft, lightweight and naturally odour resistant fibre that keeps you warm when it's cold and cool when it's warm Rib fabric…
Mens Red Band Boxer Shorts £7.99
4 in stock
Mens Red Band Boxer Shorts Fibre Content. 40% Cotton, 60% Polyester
Ronhill Mens Tech Reflect Half Zip Thermal Baselayer £65.00
3 in stock
Ronhill Mens Tech Reflect Half Zip Thermal Baselayer Reflective and super soft running long sleeved tee with a half zip for ventilation A lightweight, thermal base-layer designed to be worn next to the skin and ideal worn on cooler days when you need to be seen. The half-zip features a new iridescent reflective strips and a 360º reflective print. The fabric is a super soft polyester with a peached…
Ronhill Mens Tech Merino Half Zip £65.00
3 in stock
Ronhill Mens Tech Merino Half Zip Mulesing free Merino Zip Tee is designed with winter in mind and is our product of choice to layer up with under your jacket. The Mulesing-Free Merino Zip is expertly designed with winter in mind, making it the ideal base layer to pair with your jacket for optimal warmth and comfort. Crafted from premium Merino wool, this zip features a cruelty-free, natural fibre…
Keela Mens Merino Long Sleeve Zip Neck Top £64.95
£59.95 2 in stock
Keela Mens Merino Long Sleeve Zip Neck Top The ideal base layer. Our 200gsm Merino is designed to keep you warm in cooler temperatures by remaining breathable. It helps your body regulate its temperature when you’re pushing yourself to the limits. Features 1⁄4 length zip for ventilation Flatlock stitching for comfort Slim fit Temperature regulation Naturally odour resistant 80% Merino Fabric Techn…
Keela Mens Merino Long Sleeve Round Neck Top £59.95
£49.95 13 in stock
The ideal base layer. Our 210gsm Merino is designed to keep you warm in cooler temperatures by remaining breathable. It helps your body regulate its temperature when you’re pushing yourself to the limits. Features • New round neck design • Flatlock stitching for comfort • Temperature regulation • Naturally odour resistant • 80% Merino Benefits NATURALLY ODOUR RESISTANT Merino wool naturally resist…
Trespass DLX Mens Stan Baselayer £95.99
£49.99 1 in stock
DESCRIPTION 1/2 Zip Neck Top Long Sleeves Flat Seams for Comfort Dark Grey Marl with Contrast Stitching MAIN FEATURES 1/2 Zip Neck Top. The Stan top is designed with 50% Merino wool, perfect for days on the go. Merino wool is naturally quick drying, breathable and odour resistant with 50% polyester for added shape retention and durability. Long Sleeves. With long sleeves, the top features a clean…
Bawbags Scotland National Team Badge Cotton Boxer Shorts £15.00
11 in stock
The official boxer shorts of the National Scottish Football team, now available in our technical Cool De Sacs fabric! Bawbags Cool De Sacs are premium boxer shorts with our very own Technical Wicking Active Technology, (T.W.A.T.). This special quick drying fabric with a bamboo baw pouch keeps ‘em tidy whatever you get up to! A portion of proceeds from every pair of Bawbags sold goes to support can…
Bawbags Cool De Sacs Golf Baws Boxer Shorts £15.00
9 in stock
Bawbags Cool De Sacs Golf Baws Boxer Shorts Love to tee up at the green? These Bawbags Cool De Sacs Golf Baws Boxer Shorts for men might be the perfect pants for you! Our Cool De Sacs Golf Baws has been specially designed to keep you cool, calm and collected during your next game. They're made of super-comfy, breathable materials and feature our classic Bawbags cut – ensuring they sit comfortably…
Hoggs of Fife Mens 100% Merino Wool Long Pants £44.95
£39.95 7 in stock
Hoggs of Fife Mens 100% Merino Wool Long Pants Merino wool is widely accepted as the absolute best natural fibre for use in premium base layer products such as the Hoggs of Fife Mens 100% Merino Wool Long Pants. Merino wool will keep your body insulated and also wick away moisture and help to regulate your body temperature, also avoiding that chill that comes after exercise, because synthetic base…
Bawbags Cool De Sacs Scotland Rugby Technical Boxer Shorts 3 Pack £34.95
10 in stock
Some of Bawbags' best selling Scotland Rugby designs now available in a Cool De Sacs boxer shorts 3 Pack! From 2020, they're proud to say that all new Bawbags Cool De Sacs are now made from recycled plastic bottles. Check for the green recycled icon on the product image. Bawbags Cool De Sacs are premium boxer shorts with their very own Technical Wicking Active Technology, (T.W.A.T.). This special…
Hoggs of Fife Mens 100% Merino Wool Long Sleeve Crew Neck Base Layer £44.95
£39.95 15 in stock
Merino wool is widely accepted as the absolute best natural fibre for use in premium base layer products. Merino wool will keep your body insulated and also wick away moisture and help to regulate your body temperature, also avoiding that chill that comes after exercise, because synthetic base layers cool down faster. Soft against the skin and naturally anti bacterial which helps prevent odour and…
Bawbags 3 Pack of Scottish Cotton Boxer Shorts £34.95
10 in stock
They can take our freedom, but they can never take our Bawbags! The revamped Scottish 3-Pack features some of Bawbag's brilliant Scottish themed designs. From 2020, they're proud to say that all new Bawbags Originals are now made with organic cotton. It's Bawganic! Bawbags Originals are deluxe cotton boxer shorts featuring a custom fit for optimal baw comfort. Since 2007 their Originals have been…
Sprayway Mens Dornie Crew Baselayer £32.00
£25.00 8 in stock
Stretch close fitting crew that slots perfectly into any winter layering system. Stretch CoreC™ Grid fabric combines a smooth pill resistant outer face with warm and high wicking gridded back Crew neck Elastane bound cuff with concealed thumb loops Self-fabric hem
Sprayway Mens Dornie Leggings £30.00
£23.00 6 in stock
Close fitting legging that offers a boost of warmth to your winter legwear option. Stretch CoreC™ Grid fabric combines a smooth pill resistant outer face with warm and high wicking gridded back Branded wide elastane waistband Self-fabric hem
Sprayway Mens Dornie Half-Zip Baselayer £36.00
£30.00 3 in stock
Warm close fitting stretch CoreC™ Grid half-zip. Stretch CoreC™ Grid fabric combines a smooth pill resistant outer face with warm and high wicking gridded back Fitted collar Half-zip to aid venting Elastane bound cuff with concealed thumb loops Self-fabric hem