The Berg, aka Mountain, is known for a lack of glide and consistent high speed stability. There's not a ton of fade, making this disc a slow and straight flyer that does not play tricks even on windy days. Designed for distinct shots, the Kastaplast berg will sit and stay instead of sliding past the basket. The thumb track is prominent on the top side and not noticeable on the bottom. In base plastic, the K3 Berg beats in to a straighter flight with less fade than premium, for a disc that sits and stays.