...the best mosquito repellant I've found is ....a windbreaker or light rain gear!!
....They can penetrate cloth, sweatshirts etc., but they haven't seemed to develop a vinyl penetrating beak yet.
....your gonna sweat a little more, but...its worth it to me!!..I'm not sure there's a product on the market that works consistently. I've had nights where I'll swear by a certain product, then on other nights...that same product seems to attract them!!
....you could always try filling the tub with "Skin-so-soft" ...and bathing in it!!
....or better yet, fill it with "OFF"..just make sure to tape up all your cavities!!!
