The Zerofit Baselayer Bible – Your Frequently Asked Questions about fit and size – ANSWERED!

The chances are, you’ve heard or read about ‘layering up’ as the only way to effectively keep cold temperatures at bay. Layer upon layer, restricting movement, making you sweaty and uncomfortable. AWFUL. But here at Zerofit, we believe in a very different approach. Our baselayer collection is designed to minimise the number of layers you need, whether that be with the Heatrub Ultimate Baselayer or Heatrub Move Baselayer.

This means greater freedom of movement, comfort and because of the pioneering Japanese technology utilised in the production of our baselayers, you will also experience superior warmth and temperature regulation.

But how should you wear our baselayers for optimal performance? Here are the most frequently asked questions – answered!

I’ve bought a Heatrub Ultimate Baselayer – what should I wear under it and over it?

The Heatrub Ultimate Baselayer should be worn directly against your skin, and you would wear another item of clothing over it such as a polo shirt, a jacket or waterproofs. Because it’s five times warmer than a regular baselayer, there is no need for multiple layers over the top, giving you superior freedom of movement for all activities.

I’ve bought a Heatrub Move Baselayer – what should I wear under it and over it?

The Heatrub Move Baselayer should be worn directly against your skin, there is no need for any layer underneath it. Regarding layers over the top, this depends on what sport or activity you’re using the Move for. If you’re a runner or a cyclist, we would encourage you to use the Move as the only layer you’ll need for those activities, but the technology still works if, for example, you’re a motorcyclist who is using it and needing leathers or a jacket over the top.

Are Zerofit baselayers unisex?

All of our baselayers are designed for male and female users – the stretch fabric of the material across the collection means the baselayers adapt to body contours.

How should my Heatrub Ultimate baselayer fit?

The Heatrub Ultimate do not work on compression or tightness to keep you warm – the Heat Threads actively generate the warmth rather than trapping your body warmth using compression as a technology. Therefore, it should be a snug fit against your body shape but not uncomfortably tight. You should be able to comfortably put your hands over your head and freely move your shoulders and arms without it feeling restrictively tight.

How have you worked out your size chart?

Our size chart is based on chest sizes assuming a regular body shape. If you have a larger than standard tummy you may be better to choose the next size up as more fabric is required to ensure the garment does not ‘ride up’. Similarly, if you’re a gym bunny and you’ve got a strong upper body in the chest and shoulders, always go up a size. For women, the same advice would apply to bust sizes.

Your size chart is based on chest sizes – how does the rest of the garment change as the chest size increases?

All parts of the garment increase in measurement as you go up the sizes, so the arms get longer and the body length of the baselayer increases too. If in doubt, always go up a size when it comes to the Heatrub Ultimate Baselayer.

Is there much difference between sizes?

Due to the unique stretch of the baselayer, you will find you can get into a number of sizes with a neater fit on the smaller sizes. Some consumers like a neater fit others like a looser fit, thus there is not a huge difference between sizes. 

Are all Zerofit baselayer styles the same fit?

There are slight differences between the MOVE and the other garments which follow the same size pattern. We recommend large in an ultimate is a 40-44” chest, in the MOVE its 43-47”. If you are a standard body shape and a 43/44” chest you could order large in both. 

How does your fit compare to other brands?

In our experience there are three main fits - USA fit (oversize), Scandinavian fit (slim) and UK fit (standard) and our products follow a UK fit. If you are used to USA brands, Zerofit products fit a little neater and if you are used to brands that are aimed at the Scandinavian market they will be a little bigger. Please note that some of the big brands offer different fits in the USA to that in Europe.

Why is the Neckline looser on the Heatrub Ultimate than a regular baselayer?

This is a design feature specific to this baselayer – during testing, analysis and feedback indicated that the traditional tight, high neckline created significant overheating for the users – our Japanese engineers created a more relaxed neckline to allow some heat to escape in order to minimise this issue.

Will the outer fabric on the Heatrub Ultimate Baselayer pill or bobble?

Due to the small element of wool (7%) in the Ultimate, there is a chance of pilling. In order to reduce the risk, we advise customers to wash the product inside out, and use a fabric shaver to help de-bobble the baselayer. Please note, this issue has only happened to a handful of customers. 

How do I wash my Zerofit baselayers?

Washing instructions are stated on the website product pages, but all garments can be machine washed at 30-40° - please do not use a tumble dryer afterwards.

We hope that this overview of fit assists in your selection and do not hesitate to contact us on info@zerofit.co.uk we also would like to remind you that we offer a no quibble free return service in the UK and Ireland.