To add to Phil's post

Adaptability to weather conditions:

I long distance ride and temps from morning to evening can vary quite a bit. I use arm sleeves, lycra skull cap and knee warmers, as well as a thin shell layer and shoe covers along with my cycling shorts and jersey. This modular approach allows me the minimal amount of "baggage" to be able to adapt from morning chill, mid day sun and even brief showers. They work, are light weight, fold small and avoid the redundancy of having to bring multiple clothing items such as long sleeve shirt/short sleeve shirt, pants/shorts.