I keep a set of Frogg Toggs stowed in a dry bag regardless of conditions and what ever else Im wearing/bringing. They are VERY light weight and extremely packable ... and only cost around $50 for a set. I bought a set that permanently stays in the AI
I was out last summer on a hot 90deg full sun day with no stronger than 10 mph winds - I was in swim trunks, a Tshirt and my PFD
By late afternoon I was baked and the sun was mostly obscured and the wind and chop were up considerably and I had a few miles to sail back to the launch site. Within about a half hour or so I was chilled to the bone from the spray (dripping wet) and wind and being sun-soaked ... when I remembered the FroggToggs and what a tremendous difference they made. Within a few minutes the shivvers had gone away and I patted myself several times on the back for having them on board.
The Frogg Toggs Pro Advantage suit, previously called the Frogg Toggs Pro Angler Suit, is constructed of three layers of polypropylene material with a center layer of microporous film. Because the pores are 20,000 times smaller than a water droplet, moisture cannot penetrate. Body vapors escape while wind and rain stay out keeping you cool and dry. The patented seaming process eliminates needle holes and possible water entry. The entire suit weighs less than 1 pound. The Frogg Toggs Pro Advantage Rainsuit is able to store easily in a tackle box, golf bag or motorcycle storage compartment. http://www.froggtoggsraingear.com/Suits.shtm
Also, The Pro Advantage Suit features a roomy jacket with a hood that zips into the collar. A storm flap that snaps closed to keep wind and rain out covers the full-length zipper. The Bibs are of the same construction as the pants and feature a zippered front and 11" leg zippers. With many more feature
They have lighter colors as well