Women's certain bikes come with women's saddles, grips, bars and cranks. They also ordinarily have lighter shock tunes than unisex designs. For anyone who is just seeking to get out on the bike, aluminum is great. Carbon fiber is dearer, lighter-weight, and stiffer than aluminum to be a frame material. https://tedomarket.com/product/sports-entertainment/cycling/bicycle/bmx/army-green-bmx-extreme-action-20-inches-motocross-bike-off-road-sport-bicycle-for-racing-and-stunt-riding/