Pop Up Tents are NOT meant for heavy rain, side walls can be rented separately, cannot be left outside overnight unattended. The legs are not built to sustain pooling of water. Should it rain, attention needs to be placed on watching for pooliong of water, so you can push it off. Tent can collapse if water is pooled on the top.
Gutters are good to have if using 2 tents beside eachother, and some light drizzle is expected, this way the weater will not drip between the tents.
Has velcro straps to attache to the inside of each pop up tent.
Images show the gutter installed.