Zerofit Heatrub Ultimate Base Layer Long Sleeve Shirt - Black

I wasn't entirely convinced by the hype around these base layers, but thought I'd give it the benefit of the doubt. I'm glad I did. I've worn the top most days (it's been a cold January) since purchase, and bought one for my wife too. They work best when you're moving about, but even sat stationary for most of the day in an outside office it did a great job. In hindsight I probably should have gone up a size, but no real problem. The inside liner is "hairy", but not itchy at all. Thumb holes in the sleeve cuffs would have been a nice touch to stop the sleeves riding up when putting on the bike gear - that's my only minor complaint. Washed once at 30° so far, and looks as good as new, apart from slight bobbling around the neck.

Whilst sorting out boots with Heidi, we then got onto a discussion on base layers. I landed on the zero fit . Heidi couldn't have been more helpful with her advice and sizing. Have used in the cold last week and they worked a treat. Only after 8 hours on bike did I start to feel the chill. Pretty good considering the windchill would have put the temperature in minus numbers.

I've only had one ride so far, 5 degrees, extremely comfortable, no chill whatsoever, highly recommended.

Not tested on the bike at speed, but Very warm walking around

I'm usually a medium (38-40) but had to size up to even get this over my head and upper body. Large fits how I expect a base layer to fit - I even tried XL which fit like a sweater size wise , so stuck with large so I could still layer up. Not used out yet so hope they live up to the hype. Great no hassle exchange from SBS

Really warm and comfortable and sizing spot on. I'm 40 chest 32 waist and a medium is a perfect fit. Only worn once in sub 10 degrees and I was perfectly comfortable with just this base layer and a jacket without the thermal liner. Cheaper than buying direct from Zerofit and the usual SBS service.

The only base layer you will need when paired with a windproof jacket for temps between 4-15 deg C. Above 15 it gets very warm. Comfortable with a fleece like lining. Soft neck that doesn't bunch up. Extends over your butt so no cold gap at your back.
I needed to go up one size as they are very snug.

Warmest base layer I have tried. Wore out on chilly day & kept me cosy. Long fibres on inside tech seem to work. Have to see how it performs over winter as weather gets colder. Sizing correct, 42 inch chest & went for size large. Usual excellent service from Sportsbikeshop