LOL When they run the back to school clothing sales I get at least one or two pack of each. Remmeber during SHTF you are going to do a lot more walking that mean MORE SOCKS! Taking can of your feet will be of prime importance! Ask and infantry man!
In addition, have athlete’s foot powder. Got two of the military ones years ago and some commercial product also.
Something else to consider - poison ivy scrub. Tech-Nu is the best I’ve seen. Pricey at $12-14, but if you get poison ivy, oak or sumac, you’l be glad you spent the money.