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 Plus, if you're looking for other cost-effective ways to keep the thermostat low or just to stay cosy this winter, our guides to the best blanket hoodies for kids, best draught excluders, best weighted blankets for kids, and best winter coats for women have got you covered.

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 Sure, you’ll look like you’re off to a teddy bear’s picnic in this super-soft onesie, but you’ll also be cosier than you’ve ever been. For any expectant or new mums, fans of this onesie rate it for taking in your hospital bag and wearing in those early newborn days. “It’s really soft and super comfy, easy for breastfeeding and fits well around my bump,” one reviewer wrote. Another new mum wrote: “I bought it as a postpartum treat and it's well worth the money.”Our favourite features? Perfect for keeping warm at your desk, lounging in of an evening, or even using as nightwear, this is a versatile onesie that will see you right through winter. Most women choose onesies for the comfort factor – they’re warm and great for snuggling up in and relaxing in the evening. They can be stylish too – in this case fashion and comfort do mix – or they can be simply cosy clothes you pull on to switch off from work. The Hush Elle Supersoft Henley onesie gets our vote. It’s chic, comfortable and stylish enough to wear on video calls, without your colleagues knowing you’re in loungewear. It’s also extremely soft and fans love it for everything from wearing it after giving birth to watching TV with friends. If you love M&S’s iconic pink pig as much as we do, this novelty onesie is the one to go for. Sure, you can’t wear it if you have video meetings, but it’s cute and fun, and you’ll smile every time you catch yourself in the mirror.

Our favourite features? Extra points go to this luxury onesie because if you’re on a video call, it could be mistaken for a chic top, meaning no colleagues need know that you’re cosy in your loungewear. 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.

Oodie Purple Tie-Dye Hoodie

We’re heading into autumn and winter so fleecy fabrics will keep you warm, but merino wool also has excellent thermal properties making it ideal for heat retention during colder months, and cooling when temperatures are warmer. What style onesie is best? This cute onesie is made from a blend of merino wool and lyocell (from eucalyptus) that keeps you warm, but stops you from overheating. It’s perfect if you prefer something lighter against your skin but you still want to feel cosy. 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.