Two different styles of long mesh sleeved shirts for SD13 sized boys, $12 each. These are both listed on etsy with additional pictures and info. The backs of these shirts have a velcro closure and are made of cotton and synthetic materials. I will also be listing these on DoA as well, so you can inquire about purchasing these there as well.
Black Mesh Sleeved Tee
http://www.etsy.com/view_listing.php?listing_id=11930217
Blue Mesh Sleeved Tee
http://www.etsy.com/view_listing.php?ref=vl_other_2&listing_id=11929862