The big upgrades for this winter are the new Kiss Air Seat-Pad and the Castelli wordmarks are now reflective. You would think Castelli made these just for the UK. Nanoflex fabric is warm and stretchy just like their thermoflex fabric but unlike any other Thermal or Roubaix style fabric Nanoflex is water resistant! The simple elegant design minimizes seams for greater water resistance. But the essentials are all there, Giro3 ankle grippers, Camlock zippers with reflective tape, Mesh bib straps and Brand NEW KissAir seat-pad complete the spec. The Castelli Nanoflex 2 Padded Bib Tight is ideal for cool damp days on the bike.