When I attended last year, I brought 4 pairs of khakis, which was unnecessary (you will be fine with two), also brought three pairs of black shorts. Also brought typical undergarments (socks, underwear) and toiletries. Bring athletic shoes, shower shoes, and comfortable shoes for walking, because you will walk a lot! When you arrive, they will issue you four dri-fit shirts, a USAFA polo shirt, hat, and a USAFA backpack. Also recommend bringing chapstick.What kind of clothes do you wear during summer seminar. Are you issued anything to wear or carry around that week?