I am a guy who has gotten to love wearing thong underwear. However, I have gotten tired and bored with the offerings in men's thongs such as very limited styles, horrible fabrics and designs, limited colors and high prices. Because of that I ventured into trying female thongs and was surprised to fing that there were brands and styles that fit me better, were more comfortable, have more style and color choices and are typically less expensive than any men's underwear I have ever worn. It isn't a kink or 'crossdressing' thing but one of practicality.
The fabric in this model is very comfortable and keep all male parts in place well. As for fit... I an 5' 7" and 168 lbs and wear 32 waist pants so I normally wear a size medium in men's underwear but bump up one size to a large for most female underwear. These are no exception. The fabric is about a medium weight and should be durable.
In closing I feel that there are lots of female thongs and briefs out there that would fit men as well and should be sold as "unisex". This is one of them.