Good inexpensive option. They will not blow away under any wind condition as they are heavy. One base tore when I tossed it versus placing it on the ground. After all they are rubber.

These are good quality, durable bases that once they are thrown down they will not move. I coach competitive travel baseball and would recommend these throw downs to any coach. Easy to carry and durable. BUT!!!!THEY DO NOT WORK WELL WITH METAL SPIKES..... I know what your thinking, DUH..... But I tried them out with metal spikes and they ended one practice looking like cork board rather then bases. I wish they were made out of a tougher shell that could withstand metal spikes but for rubber spikes and tennis shoe use, these are great backs. Thats the only downside I can see!