Really love these suits but wanted to leave some advice for other buyers. I wear size 32 jeans and the 32 looks and fits great in black and blue. I ordered white and red in the same size and unfortunately they're way too tight due to the extra lining in the back. I haven't tried the next size up yet but am sure it's a much better fit. The heather grey is a totally different material than the rest and kind of feels like underwear - it's comfortable but not for the modest. 

My previous 1" Speedos were made in Mexico and 32" always fit me. These are made in Sri Lanka and these are tighter--I haven't swam in them yet but I think I'll get one size larger next time. The website description mentions Lycra and the tag sewn into the suit says 78% nylon/22% lycra, but the paper sales tag that you cut off the suit says 100% nylon.

The lightest weight,best briefs that SPEEDO makes. As they are single seated, they become unserviceable (transparent) after 4-6 months of constant wear in the water