MVC Model with a list of objects as property

Thank you for all of the advice - invaluable but there was one more change I needed to make before my program would bind to the model and that was to add a getter and a setter to the List as in:

public class CartViewModel
{
    public List<CartRowViewModel> cartRows {get; set; }

    public CartViewModel()
    {
        this.cartRows = new List<CartRowViewModel>();
    }
}

Models

public class Item
{
   public List<Colour> AvailableColours { get;set; }
}

public class Colour
{
    public int ID { get; set; }
    public string Description { get; set; }
    public bool Checked { get; set; }

}

Note the Checked property

View for loop

@using (Html.BeginForm("Create", "Item", FormMethod.Post)) 
{
   <div>
    @Html.LabelFor(model => model.AvailableColours)
    @for(var i = 0; i < Model.AvailableColours.Count; i++)
    {    

        @Html.HiddenFor(m => Model.AvailableColours[i].ID)
        @Html.HiddenFor(m => Model.AvailableColours[i].Description)
        @Html.CheckBoxFor(m => Model.AvailableColours[i].Checked)
        @Model.AvailableColours[i].Description<br/>
     }
    </div>
<input type="submit" value="Submit" />
}

Note the for loop insted of foreach to enable model binding and the hidden fields to allow the values to be posted back to the controller

Model Binding To A List

Controller post

[HttpPost]
public ActionResult Create(Item model)
{
    //All the selected are available in AvailableColours

    return View(model);
}