The castelli spettacolo glove the spettacolo owes its relatively slim construction to castelli39s material choices the outer material is gore39s windstopper x fast which comes from the same family of anti weather fabrics used in the revolutionary gabbaperfetto series the windstopper shell is paired with a polartec fleece lining this design doubles up on low bulk insulation rather than plumping out with a single layer of fluff the wind and waterproof gore outer layer means