How does the durability of the dynafit...
How does the durability of the dynafit speedskins compare to the BD ascension skins?
Overall durability is comparable. The Speedskins lean towards light weight, so the plush is a little thinner (slightly less grip), but they should last as long.
Dynafit Speed skins are mohair - Ascensions are nylon. Mohairs have much shorter/thinner plush, weigh less, fold up smaller, and glide easier. That said, they will not climb as steep, nor will they last as long as an ascension skin. I have yet to encounter a skin track so steep that the Stoke+Speed skin had any trouble, so other than the durability - the Dynafit skins are superior to the BD ones in every way for my use.