Printful: Print on Demand

It's good. It's fairly easy to use and has good integration with Shopify, but doesn't have enough clothing choices for women, especially women's' hats and caps.

Also, the leggings and sports bras should have the option to be designed and sold as a set, since many people like to buy them that way. This also is an issue with product layout options on Shopify.

Additionally, your mockups are very limited. I have a PlaceIt subscription. The problem is their mockups don't always align with your products. For example, your skater skirt has a waist band; but, none of their mockups for the skater skirt have a waist band on the skirt. It should be better coordinated.