All in Motion Kids Snow Bibs Jumpsuit Overalls in Black - they're a size XS and in good pre-owned condition (normal wear & tear). Unsure as to whether they're boys or girls so I'll say they're unisex but please see measurements to ensure a good fit.

Adjustable stretch shoulder straps
Front zip closure
Elastic waist
No pockets
100% Recycled Polyester
Waist 11.5" flat & unstretched
Inseam 21"