The overall fit is superb and does not restrict body movements in comparison to the ST-6000 in the same size.I'm 5'9" 38" chest and 32" inseam. Long arms.The material is more flexible and lighter than the SR-6000, and the liner in the AS-3000 makes all movements easier.The huge zippered gussets in the legs make getting these pants on over boots a breeze, and the wider cuffs and velcro on teh sleeves also helped immensely.The SR-6000 was a pain in general to get on, especially if your leathers got a little wet before putting on the rainsuit.The longer inseam and better stirrups, plus the addition of suspenders, make movement in the pants a lot less restrictive.The set-and-forget adjustable elastic waist is a lot more comfortable than the permanently tight waist on the SR-6000.I haven't worn this suit in the rain yet, but hopefully rain resistance is as good or better, given the price difference. The material seems to be the same as my Nelson-Rigg Boot Covers, and they remain waterproof after a year of above-average use.