GHBloodworm

Make sure the ribbing is strong enough to cinch down, but not too thick (a red wire could work too). Also, keep the ribbing wraps tight to avoid a loosely bound overlay of the vinyl rib material; otherwise the top of the body will rotate and weaken.

Translucent plastic ribbing and body material. Half round in cross section (flat one side, round the other). Soft and pliable. There are two sizes and eight colors to choose from.