Go for the durable Spectrum ASA Kevlar, an ASA filament that contains added Kevlar fibers. This makes the filament resistant to both different weather conditions and damage from impact. Thanks to the combination of ASA and Kevlar, this filament has a long lifespan. Kevlar itself is not resistant to UV radiation, but ASA is. In addition, the added fibres ensure less shrinkage, which is ideal for larger 3D prints. ASA Kevlar is suitable for use in designs that need to be strong and resistant to sunlight. The Kevlar particles give your 3D prints a rough and matte appearance. This is a 1.75mm natural filament on a 0.75kg spool.