I've had at least 5 orders from SkinFit. All orders are custom made in Mexico after you order, hence the significant delay time. Deliveries to the USA take at least 30 days and my last order for Black Friday took over 60 days. But it was worth the wait. I second the comment that the underwear/jocks alone aren't the best. But the singlets, bodysuits and superhero suits are freaking amazing. The material they use is super shiny, smooth and slick. The jock singlet is one of my favorite pieces I've gotten from them and I've ordered 2 more since.
Pro Tip: If you are impatient, checkout their Outlet (Skinfast Outlet) which seems to be premade items that ship faster and much better pricing.
https://skinfit-internacional.myshopify.com/collections/skinfast