PRT™ Transition Boots are wrap around, heat shrinkable boots that provide a protective cover and strain relief from a Connector Backshell to the primary wire bundle. The transitions are ideal for in-service electrical system modifications as they eliminate the need to remove or disassemble the associated connectors and hardware. They can eliminate the need for expensive, specialty molded boots and in some cases minimize the heavy wall thickness that results when using high expansion ratio tubing. A Hot Air heat gun is used to recover the boots in the same manor as standard, non-split, tubing or molded boots. Wrap-a-round transition boots are ideal for assemblies with non removable electrical connectors. This material has an operational temperature range of -55 to 135°C.