After training in the army all day, the body must be very tired. You can buy a massager and let him take it out to massage and relax his body when he rests. There are mini ones, which are convenient to carry and save space. There are also larger ones, which can be used for full-body massage in the dormitory. After a tiring day, take a shower and massage, which is particularly comfortable.
A belt would be a good choice, leather is best. Soldiers have a special love for belts, which may be due to their profession, so it is important to have a belt that suits them.
You can give them a casual outfit, buy comfortable materials, cotton or just natural materials. Take off the military uniform and change into the underwear bought by your child. Even if you are tired, you will feel comfortable. Find out the size and don't buy the wrong one.
In short, the thought is the most important. You can also buy some daily necessities that are often used and consumed quickly.