Masters of Mass Customisation and members of The Guild of Master Craftsmen. Established in 2008 by Kate Dawson pioneer and award winning entrepreneur The All-in-One Company are the originators of the Create Your Own Onesie. Each and every product has been designed by the customer and is hand made to order in Northumberland UK. Working alongside The National Autistic Society the Sensory Onesie was launched in 2017 helping change the lives of those with sensory needs. Working with disability sports clubs team onesies can be made for all team members. Plus size size onesies, made to measure onesies are our speciality. We design and make promotional onesies for marketing campaigns and competitions. Personalised with logos, names, messages. Made in premium fabrics, with love, that will last a lifetime. Why do we do what we do? Because we care.