ok

    public static void speed(InventoryHolder holder, ItemStack item) {
        if(item.getItemMeta().getLore().contains(ChatColor.GRAY + "SPEED")){
            if (holder instanceof Player){
                final Player p = (Player) holder;
                if (p.getInventory().getBoots() != null) {
                    //p.sendMessage("Adding speed...");
                    p.setWalkSpeed(2);
                } else {
                    //p.sendMessage("Removing speed...");
                    p.setWalkSpeed(1);
                }
            }
        }
    }