Nylon’s stretch and abrasion resistant properties make it much better suited for high heavy impact usage vs. the poly nets. If it is indoors then there is little reason to put poly over nylon, performance will be the only factor and nylon will always out perform poly. In an indoor application the only reason to choose poly over nylon are budget constraints, as the poly nets are less expensive.
#21 Nylon nets are used mostly for youth to middle school age
#36 Nylon nets are used mostly for middle school and up
Excessive heavy usage by college, semi-pro, & pro level players is NOT recommended for #21 or #36 gauge. If that is the application you are looking for, contact us for a quote. Many other sizes and gauges are available upon request.