The Calypso K tires are constructed with a 220 tpi polyester-cotton casing with Kevlar belting for incredibly supple but durable ride. Opposing file tread on a 3D compound makes for perfect adhesion to the road that the Gommitalia is known for.
Like most clincher tires designed in Italy, they have that super supple casing and soft rubber that gives them the "Open Tubular" feel on the road. A tire that rides this nice will not last forever like a high mileage training tires. However, if superb ride quality and grip is at the top of your priority list for a tire, the Calypso K could be the tire you are looking for.