Is this able to be worn under a shirt without being seen by anyone? My nephew has severe asthma and food allergies. Ever since he started school he has carried a mini back pack. He carries an inhaler, spacer, epipen, benadryl and I believe a few other things that I can't recall. However at almost nine he's starting to rebell and feels self concious. My sister would like other options for him. She's aware that he might not be able to carry everything on him at all times, but if he could at least carry his epipen and inhaler with everything else nearby that might work. I suggested cargo pants but she's leary of that idea with having to make sure things get switched to clean pants etc and the cost as he owns none and she's on a very limited budget. However he won't like a spibelt if it can't be covered by his shirt. Any thoughts? Lia doesn't have one and also carries a mini back pack. She doesn't like stuff around her waist and just wears her pump in a croc o dial case or sometimes in a pocket.