I am 5'10", 160 lbs. I wear a size 30 jeans. My preferred swim brief is Turbo (I own about 8 pair), where I wear a size small (which also indicates size 30 on the tag). I swim 2-3 miles a day, six days a week at a local YMCA. Given the sizing guide, I was struggling with whether to choose a 30 or 32. I decided on the 30. I'll review this by contrasting it against my Turbo suits. The waist and leg openings on both suits are equivalent. The backside coverage of the QSwimwear is quite a bit smaller than the Turbo. I had to choose between showing cheeks or crack ... I chose cheek. The front coverage of the Turbo is pretty low, but it's nothing compared to the QSwimwear. This suit is extremely low. Aggressive personal grooming is an absolute must. The drawstring in the QSwimwear is flat, compared to a round one in Turbo. Both suits are fully lined polyester, the Turbo is lined in white, the QSwimwear is lined in black. The outside material in the QSwimwear is smoother and shinier than the Turbo material. If you've never worn a water polo suit, know that they are designed to be very durable (double stitched), fully lined, and very tight fitting. The material is polyester which provides the benefit of longevity (material doesn't stretch or fade), but also doesn't have nearly the elasticity of nylon/Lycra). For those who are well endowed, realize that tight (and non-elastic) applies to the front as well - which means that having your manhood compressed is part of the program. Comfort…