Southpole Men'S Basic Fleece Shorts Review

Have only had it a month and there's a big hole in the back pocket. I don't keep keys or any sharp objects in the pocket so I don't know what could have caused this. This happened to my grey shorts. I also got them in black. The black shorts have no hole but look extremely worn in less than a month. I have similar shorts from another brand that are a month older and have held up much better with no issues.