A slim fit, mock neck, and elongated cuffs with functional gold cap snaps make the Joni Long Sleeve by Nation LTD ideal for transitional dressing. A slim fit, mock neck, and elongated cuffs with functional gold cap snaps make the Joni Long Sleeve by Nation LTD ideal for transitional dressing. Mindfully designed in Los Angeles, Nation LTD's beautiful, comfortable, and perfectly undone wardrobe essentials embody everything that's California-cool.