Resale platform says it rejected more than 370,000 products worth nearly $74m for not meeting verification standards.

"I bought these to wear as warm, cozy slippers at home. They slide on and off easily and provide good support and cushioning ...

"Comfy and a perfect fit. Great for summer or just lounging in the house," says a third. Nike offers free shipping on orders ...

Summer calls for effortless footwear that can transition from beach days to brunch dates, and J.Crew Factory's Crisscross ...