My 14 yr old son has recently taken up Kayak Polo which he does in the local pool and takes his pump off for an hour or so. In the summer he is doing a day trip on the river canoeing and will need to wear his pump all day whilst in the canoe. Can anyone recommend a pouch to hold his pump that is waterproof or a sports top that will have a pocket to hold his pouch comfortably. He has a Medtronic 640g which we have been told is fine in water up to a certain depth. He usually wears his pump in a 'Hid in' belt which works well on dry land but not sure how stretchy that might be in water. Any advice especially from diabetic canoeists would be great! Thank you