What protein? (for a navy seal)

Hi guys, i recently joined the army and have chosen to go to the navy seals.

For my height i am underweight and id like to gain at least 10 KG, asap.

Training starts on monday and gets more intensive as the months go by.

more info: we train on monday tuesday thursday and friday. monday and friday are half day training. Lots of swimming jogging pushups.

Id like to know what protein you guys would recommend. i currently take a multivitamin every morning and a system toner.

ty

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V,
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Whey in the mornings, and casein in the evenings.  Eggs and egg whites are your friend whenever you can get them.  Your greatest ally for growth is food.