The Float line excels in flats from 6 inches to 3 or 4 ft. The float/6ft sink is great for 3-5ft and the float/15ft sink can handle 5-8ft or more. Their clear tips add stealth. The full sink works great for 5ft plus if you're employing faster presentations (tarpon/snook) and also excels fishing the drops at the edge of flats where schools of fish often travel.