Cycling Garments
You possibly want pockets if you mean for the gilet to be part of the layers you keep on the entire trip. The Skylon material which gives white Cycling gilet womens the gilet its name (and a whiff of 50's fond memories, go Google it kiddies) has a slightly rubbery feeling, a bit like latex workshop gloves.
Coffee shop du Cycliste's Female's Albertine thermal gilet is a thickly padded layer that absolutely keeps your core comfortably warm, and also gives outstanding windblocking on descents. Construction is very good indeed - the windproof front panels are made of a ripstop-style textile, while the back panel is extremely fine mesh with additional openings for outstanding breathability.
These serve for additional protection when it's very chilly, or for cool-weather informal cycling; they're usually styled so they look rather normal off the bike as well. At one end of the complexity scale, some gilets do without, some just have ports so you can get across your jacket pockets.
The gilet isn't as packable as the others included below, but it should still suit a jacket pocket when not being used. Ripstop isn't stretchy so Galibier has included Roubaix Lycra side panels to keep the gilet nice and fitted on the bike. It's very soft too, which implies you do not obtain that plasticky feel like you do from a lot of light-weight gilets.
The Lusso Skylon Gilet doesn't make a fuss, it just keeps the wind off your body as well as helps to keep core temperature while being tiny sufficient to scrunch into a back pocket. With its thickness contrasted also to other thermal gilets, either you dedicate to using it all day or you bring a bikepacking bag to stash it in.