Both Crystal Clear Acrylic and Bio Gel are nail enhancement bases that can strengthen the growth and lengthen your nails (short, medium, long, extra long). These bases can be applied onto your natural nails (aka overlay) or on nail extensions tips that are carefully placed onto your nail beds.  Crystal Clear Acrylic is the stronger and thicker nail enhancement base compared to bio gel. It is typically done by mixing a powder (polymer) and a liquid (monomer) to create that dough-like consistency that can then be filed and carefully molded onto your natural nails / nails extensions. PRO: Great for those who are hard on their nails, use their hands for work quite a bit, or want to go for medium to extra long lengths nails.  Bio Gel is the thinner, odorless, and flexible base compared to crystal clear acrylic. This is a ready-mixed product of monomer and polymer which is carefully placed on your natural nails / nail extensions and cured under a lamp that emits UV light. PRO: Bio Gel can easily be applied over your natural nail for a thin natural looking nail. It is also flexible and lightweight. No matter which type of nail enhancement base you choose, if applied correctly by an experienced technician, both Crystal Clear Acrylic and Bio Gel nail enhancement bases should leave you with the same result: long, healthy, and beautiful nails.