Nike x Wool Classics 1/4-Zip Top Black. Its clean style and solid color make this sweatshirt a classic to add to your daily rotation. Using a premium blend of wool and cotton, this one is made for elevated, everyday comfort. 52% Cotton, 43% Wool, 5% Nylon. Relaxed Fit. Stand-Up Collar. Half-Zip Closure. Embroidered Branding at Sleeve. Ribbed Cuffs and Hem.