Men's Thermal Top – Fleece Lined Long Sleeve Crew Neck Base Layer

The Activearo Men's Thermal Top is a long sleeve crew neck base layer with a soft brushed fleece lining, made to go on first and sit under the shirt you already wear. Most mornings in winter the choice is a cold T-shirt under your flannel or a hoodie that will not fit under your jacket. This is the layer in between.

It is a polyester knit with a smooth outer face and a plush fleece face on the inside, so the soft side is against your skin and your shirt slides over the smooth side. The crew neck is narrow and low, finished with a slim band and two rows of stitching, so it stays below a shirt collar, and the knit cuffs keep the sleeves at your wrists when you reach.

Under a work shirt on a cold building site, on its own at the kitchen window before sunrise, or under a canvas gilet while you clear the driveway, it gives you a soft fleece-lined layer you do not have to think about. With the flannel off, it looks like a plain long sleeve shirt.

Here is what it is not. It is not waterproof or windproof, so wear your shell over it when the weather turns. The maker gives no temperature rating, so we are not going to invent one. And we do not have garment measurements from the maker yet, so we will not guess at the fit for you.

Key Features:

• Brushed plush fleece lines the inside of this thermal top, so the soft side of the fabric is the side that sits against your skin.
• Smooth polyester knit outer face lets a flannel, work shirt or jacket slide on over the top instead of catching on the layer underneath.
• Narrow low crew neck with a slim self fabric band stays hidden below a shirt collar rather than showing above it.
• Close knit cuffs hold the long sleeves at your wrists when you reach overhead or pull on gloves.
• Plain design with no pockets, no zips and no printed logo, so it works as thermal underwear under your clothes or as a long sleeve shirt on its own.
• Available in Dark Grey and Black, in six sizes from L up to 5XL for bigger frames.

Activearo makes gear for people who would rather be outside than fussing with their kit. A warm layer only earns its place if you forget it is there, which is why this one goes underneath.

Pair it with one of our fleece jackets or softshells for the layer on top.

Free shipping in the United States and the United Kingdom.

Check our Shipping Policy for more information.

If you decide to return the items for whatever reason you may do so within 30 days from the day that you received them. Read more in our Return and Refund Policy.