Fans say it’s fantastic to wear on top of pyjamas for an extra cosy layer, plus they praise it for staying just as fluffy when washed. One reviewer even noted it’s so cosy they don’t need to put the heating on - the ultimate praise when energy bills are soaring. As Money Saving Expert Martin Lewis keeps saying, it’s easier to heat the person than to heat the home, and wrapping up in a onesie when you’re the only one home is more cost-effective than blasting out the heating. As Martin Lewis said, it’s easier to heat the person than the home, so if you’re home alone during the day, rather than spending money heating the whole house, it’s worth layering up in a onesie to conserve warmth. Our Swears By edits are compiled by journalists with expertise in the areas they’re writing about. To help ensure we give the best, most accurate and trustworthy recommendations, they follow several steps when choosing products. Recommendations from real parents Before we recommend new products, we always ask our trusted Mumsnet users, of which there are more than seven million each month. That’s a lot of honest, impartial advice. Expert guidance

The Hush onesie is expensive though, so for a more affordable option, Dunelm’s Teddy Bear Feather Soft Marl Onesie is an ultra-snuggly option. Do you wear anything under a onesie?Lastly, think about if you want a novelty onesie, that makes you look like a cute character, or if you prefer a more adult onesie. Are onesies pyjamas or loungewear? Reviewers commented that it is super fluffy, so watch out on first wear, as you’ll likely have fluffy bits around the house. That’s up to you! If it’s a thinner onesie, most people tend to just wear underwear underneath, but if you’re planning to wear clothes under your onesie to keep warm at home, remember to size up. Many onesie fans note that they wear their pyjamas under their onesie when they’re lounging in the evening, so again, size up if this is your desire. Can adults wear onesies? The hood is good for chilly evenings too, and it’s easy to slip on and off, with a zip that reaches to the hips.

Look at the sleeves and ankles of your onesie. Many come with elasticated cuffs to keep you warm, but if you think you’ll find that annoying, opt for a looser fit onesie. Secondly, think about whether you want to wear pyjamas or thermals underneath your onesie, or just underwear. If you plan to wear clothes underneath it, size up.

2. Best warm onesie for women: OHS Teddy Fleece Onesie Long Jumpsuit

Choosing the best women’s onesie is down to personal choice, but there are a few things to consider before investing in your cosiest outfit yet.